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The Rate-Limiting Step
 
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042 - The Rate Limiting Step In this video Paul Andersen explains why the slowest elementary step in a chemical reaction is the rate-limiting step. This step can be used to determine the overall rate law of the chemical reaction. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: File:Carbon-monoxide-3D-vdW.png, n.d. http://commons.wikimedia.org/wiki/File:Carbon-monoxide-3D-vdW.png. File:Nitric-oxide-3D-vdW.png, n.d. http://commons.wikimedia.org/wiki/File:Nitric-oxide-3D-vdW.png. "File:Nitrogen-dioxide-3D-vdW.png." Wikipedia, the Free Encyclopedia. Accessed November 2, 2013. http://en.wikipedia.org/wiki/File:Nitrogen-dioxide-3D-vdW.png. "File:Oxygen Molecule.png." Wikipedia, the Free Encyclopedia. Accessed November 2, 2013. http://en.wikipedia.org/wiki/File:Oxygen_molecule.png. Jynto. Space-filling Model of the Carbon Dioxide Molecule, One of the Most Important Chemical Compounds in the World - Vital for Life as We Know It, but Catastrophic at Excess Levels., July 15, 2011. Own work. http://commons.wikimedia.org/wiki/File:Carbon_dioxide_3D_spacefill.png.
Views: 60417 Bozeman Science
Enzymes Stabilize Transition State
 
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Views: 56211 AK LECTURES
Activation Energy
 
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039 - Activation Energy In this video Paul Andersen explains how the activation energy is a measure of the amount of energy required for a chemical reaction to occur. Due to the collision theory the activation energy requires proper energy and orientation of the colliding molecules. The Maxwell-Boltzman distribution can be used to determine the number of particles above and below this point. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: "Reactions & Rates." PhET. Accessed October 20, 2013. http://phet.colorado.edu/en/simulation/reactions-and-rates. Sharayanan. English : Depicts the Main Idea Behind the Kinetic Theory of Gases — That Is, Gases Are Made of Molecules Whose Permanent Hits on the Walls of the Container Is Perceived as Pressure, and Whose Excitement Is Related to Temperature., August 8, 2007. Own work. http://commons.wikimedia.org/wiki/File:Kinetic_theory_of_gases.svg.
Views: 231715 Bozeman Science
Energy of Activation and Transition State Theory
 
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Chemistry_c-9-10-chem-ener-102.mp4
Views: 3494 Sabaq. Pk
Relationship Between Arrhenius Activation Energy and Transition State Theory (Eyring Equation)
 
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Introduces how activation energy can be computed from enthalpy change of the transition state. Made by faculty at the University of Colorado Boulder, Department of Chemical & Biological Engineering. Check out our Chemistry playlist: https://www.youtube.com/playlist?list=PL4xAk5aclnUi1CEFNwjcheMgyWe8BwuLS Check out our Kinetics/Reactor Design playlists: https://www.youtube.com/user/LearnChemE/playlists?view=50&flow=list&shelf_id=7 Are you using a textbook? Check out our website for videos organized by textbook chapters: http://www.learncheme.com/screencasts/kinetics-reactor-design
Views: 7688 LearnChemE
Activation energy and Enzymes (Animation)
 
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This animation explains about activation energy and enzymes. Enzyme activation energy is the most important thing for enzyme catalysis reaction. Watch the video for details. http://shomusbiology.com/ Download the study materials here- http://shomusbiology.com/bio-materials.html Remember Shomu’s Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomu’s Biology- Buy Shomu’s Biology lecture DVD set- www.shomusbiology.com/dvd-store Shomu’s Biology assignment services – www.shomusbiology.com/assignment -help Join Online coaching for CSIR NET exam – www.shomusbiology.com/net-coaching We are social. Find us on different sites here- Our Website – www.shomusbiology.com Facebook page- https://www.facebook.com/ShomusBiology/ Twitter - https://twitter.com/shomusbiology SlideShare- www.slideshare.net/shomusbiology Google plus- https://plus.google.com/113648584982732129198 LinkedIn - https://www.linkedin.com/in/suman-bhattacharjee-2a051661 Youtube- https://www.youtube.com/user/TheFunsuman Thank you for watching In chemistry, activation energy is a term introduced in 1889 by the Swedish scientist Svante Arrhenius that is defined as the energy that must be overcome in order for a chemical reaction to occur. Activation energy may also be defined as the minimum energy required to start a chemical reaction. The activation energy of a reaction is usually denoted by Ea and given in units of kilojoules per mole. Activation energy can be thought of as the height of the potential barrier (sometimes called the energy barrier) separating two minima of potential energy (of the reactants and products of a reaction). For a chemical reaction to proceed at a reasonable rate, there should exist an appreciable number of molecules with energy equal to or greater than the activation energy. At a more advanced level, the Arrhenius Activation energy term from the Arrhenius equation is best regarded as an experimentally determined parameter that indicates the sensitivity of the reaction rate to temperature. There are two objections to associating this activation energy with the threshold barrier for an elementary reaction. First, it is often unclear as to whether or not reaction does proceed in one step; threshold barriers that are averaged out over all elementary steps have little theoretical value. Second, even if the reaction being studied is elementary, a spectrum of individual collisions contributes to rate constants obtained from bulk ('bulb') experiments involving billions of molecules, with many different reactant collision geometries and angles, different translational and (possibly) vibrational energies - all of which may lead to different microscopic reaction rates. Source of the article published in description is Wikipedia. I am sharing their material. © by original content developers of Wikipedia. Link- http://en.wikipedia.org/wiki/Main_Page
Views: 28796 Shomu's Biology
Transition States Vs Intermediates
 
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via YouTube Capture
Views: 7561 Roxi Hulet
Potential Energy Diagrams - Chemistry - Catalyst, Endothermic & Exothermic Reactions
 
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This chemistry video tutorial focuses on potential energy diagrams for endothermic and exothermic reactions. It also shows the effect of a catalyst on the forward and reverse activation energy. It describes the relationship of the enthalpy of a reaction with the potential energy difference of the reactants and products. It also shows you how to identify the transition state or activated complex as well as any intermediates. This video shows you how to draw a 2 step PE diagram and a 3 step potential energy diagram. In addition, it shows you how to identify the slow step or the rate determining step.
Energy Diagrams
 
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Views: 151806 Brightstorm
Enzymes' Effect on Activation Energy and Free Energy
 
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Views: 66070 AK LECTURES
Transition-State Analogs and Catalytic Antibodies
 
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Views: 21805 AK LECTURES
How Do Enzymes Work? (Activation Energy)
 
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Enzymes speed up (catalyse) chemical reactions by lowering the amount energy required to start the reaction. The energy required to start the reaction is called activation energy. Enzymes lower activation energy by either putting strain on the chemical bonds of a substrate molecule or bringing substrate molecules (reactants) together in the correct orientation so that they react more readily. For more Biology video lessons check out www.anytimeeducation.com
Views: 44589 Jeremy LeCornu
17.02 Drawing Transition States
 
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The transition state of a step is intermediate in structure between reactants and products. Practical examples showing changes in charge, bond order, geometry, and hybridization.
Views: 892 Michael Evans
Rates affected by Activation Energy; 1 vs 2 step reactions
 
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Energy diagrams for 1 step & 2 step reactions; Rate Laws for elementary steps
Views: 4089 Michele Berkey
KInetics: Transition State Theory
 
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This video discusses transition state theory and energy diagrams. Catalysts are also discussed in the context of energy diagram manipulations. Videos made by Clarissa Sorensen-Unruh on CNM Glass.
Views: 6966 C. Sorensen-Unruh
Transition state theory
 
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In this screencast, Gwen Pilling discusses transition state theory and the importance of Gibbs energy profiles. http://ukcatalogue.oup.com/product/9780199691852.do#.UT8pidY4vTq
Energy Diagrams, Catalysts, and Reaction Mechanisms
 
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It's time to learn a little more about a chemical reaction. How do molecules have to be arranged and how much energy do they have to collide with? What's a catalyst? Lots of great tidbits in this one. Subscribe: http://bit.ly/ProfDaveSubscribe [email protected] http://patreon.com/ProfessorDaveExplains http://professordaveexplains.com http://facebook.com/ProfessorDaveExpl... http://twitter.com/DaveExplains General Chemistry Tutorials: http://bit.ly/ProfDaveGenChem Organic Chemistry Tutorials: http://bit.ly/ProfDaveOrgChem Biochemistry Tutorials: http://bit.ly/ProfDaveBiochem Classical Physics Tutorials: http://bit.ly/ProfDavePhysics1 Modern Physics Tutorials: http://bit.ly/ProfDavePhysics2 Mathematics Tutorials: http://bit.ly/ProfDaveMaths Biology Tutorials: http://bit.ly/ProfDaveBio American History Tutorials: http://bit.ly/ProfDaveAmericanHistory
Transition State vs Intermediate
 
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Views: 2468 Denovo Tutor
Thermodynamic Interpretation of Transition State Theory: The Eyring Equation
 
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Introduces how rate constants can be calculated from thermodynamic properties of transition states. Made by faculty at the University of Colorado Boulder, Department of Chemical & Biological Engineering. Check out our Chemistry playlist: https://www.youtube.com/playlist?list=PL4xAk5aclnUi1CEFNwjcheMgyWe8BwuLS Check out our Kinetics/Reactor Design playlists: https://www.youtube.com/user/LearnChemE/playlists?view=50&flow=list&shelf_id=7 Are you using a textbook? Check out our website for videos organized by textbook chapters: http://www.learncheme.com/screencasts/kinetics-reactor-design
Views: 9859 LearnChemE
Collision theory | Kinetics | Chemistry | Khan Academy
 
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An introduction to collision theory and activation energy. Watch the next lesson: https://www.khanacademy.org/science/chemistry/chem-kinetics/arrhenius-equation/v/arrhenius-equation?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chem-kinetics/copy-of-kinetics/v/zero-order-reaction-with-calculus?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Chemistry channel: https://www.youtube.com/channel/UCyEot66LrwWFEMONvrIBh3A?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Enzyme-Catalyzed Reactions.mp4
 
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Welcome to the Humbio Core Chem bootcamp online! The following concepts will be covered in this tutorial: o Thermodynamics vs Kinetics o Enzyme properties and function o Rate of reaction: activation energy and concentrations At 1:36, answer the following question: 1) If a process is spontaneous the energy of the final state will be ____________ (higher/lower) compared to the initial state, and the stability of the final state will be ___________ (higher/lower). a) Higher, Higher b) Higher, Lower c) Lower, Lower d) Lower, Higher At 4:34, answer the following question: 2) Which of the following is NOT true of enzymatic catalysis? a) Use of an enzyme speeds the reaction b) Enzymes alter the structure of substrates to speed the reaction c) Enzymes are highly specific to a given reaction At 7:39, answer the following question: 3) Adding a lot of enzyme would _________ (increase/not effect/decrease) the rate of a reaction and __________ (increase/not effect/decrease) spontaneity. a) Not Effect, Increase b) Decrease, Decrease c) Increase, Not Effect d) Decrease, Not Effect For more practice, see worksheet: https://sites.google.com/site/humbiocore/test/enzyme-catalyzed-reactions
Views: 7944 Humbio Core
Chemical Kinetics 3.4 - Steady-State Approximation
 
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Short lecture on the steady-state approximation for the concentration of reaction intermediates in chemical kinetics. The steady-state approximation says that the change in the concentration of a reaction intermediate over time is zero. This allows us to solve for the time-dependent concentration of the intermediate, and thus determine the overall reaction rate. Notes Slide: http://i.imgur.com/PkEXPcP.png --- About TMP Chem --- All TMP Chem content is free for everyone, everywhere, and created independently by Trent Parker. Email: [email protected] --- Video Links --- Chapter Playlist: https://www.youtube.com/playlist?list=PLm8ZSArAXicIICTX4VBcaznDdb8a4Ukl0 Course Playlist: https://www.youtube.com/playlist?list=PLm8ZSArAXicJAzGE7ebwSOiFN-f9xEOKu Course Review: https://www.youtube.com/playlist?list=PLm8ZSArAXicKxzkcm_4i0cvDExBseQC4n Other Courses: https://www.youtube.com/playlist?list=PLm8ZSArAXicIXArfap9Tcb8izqRPvE0BK Channel Info: https://www.youtube.com/playlist?list=PLm8ZSArAXicLlGO4Rvpz-D6vX8MFbOn4V --- Social Links --- Facebook: https://www.facebook.com/tmpchem Twitter: https://www.twitter.com/tmpchem LinkedIn: https://www.linkedin.com/in/tmpchem Imgur: https://tmpchem.imgur.com GitHub: https://www.github.com/tmpchem --- Equipment --- Microphone: Blue Yeti USB Microphone Drawing Tablet: Wacom Intuos Pen and Touch Small Drawing Program: Autodesk Sketchbook Express Screen Capture: Corel Visual Studio Pro X8
Views: 30588 TMP Chem
Calculate Activation Energy (Slope OR formula)
 
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Given two rate constants at two temperatures, you can calculate the activation energy of the reaction. In the first 4m30s, I use the slope formula (y2-y1 / x2-x1) In the last half, I use the Arrhenius equation to solve for Ea directly.
Views: 51109 chemistNATE
Maximal Velocity and Turnover Number of Enzymes
 
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Views: 57070 AK LECTURES
Draw a Potential Energy Curve for this Reaction (Given Mechanism)
 
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Draw a Potential Energy Curve for this Reaction (Given Mechanism) including activation energies of forward and reverse reactions, enthalpy change (delta H), transition states, intermediates, and axes labels. Check me out: http://www.chemistnate.com
Views: 7896 chemistNATE
Thermodynamics and Chemical Dynamics 131C. Lecture 26. Transition State Theory
 
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UCI Chem 131C Thermodynamics and Chemical Dynamics (Spring 2012) Lec 26. Thermodynamics and Chemical Dynamics -- Transition State Theory -- View the complete course: http://ocw.uci.edu/courses/chem_131c_thermodynamics_and_chemical_dynamics.html Instructor: Reginald Penner, Ph.D. License: Creative Commons BY-NC-SA Terms of Use: http://ocw.uci.edu/info. More courses at http://ocw.uci.edu Description: In Chemistry 131C, students will study how to calculate macroscopic chemical properties of systems. This course will build on the microscopic understanding (Chemical Physics) to reinforce and expand your understanding of the basic thermo-chemistry concepts from General Chemistry (Physical Chemistry.) We then go on to study how chemical reaction rates are measured and calculated from molecular properties. Topics covered include: Energy, entropy, and the thermodynamic potentials; Chemical equilibrium; and Chemical kinetics. Thermodynamics and Chemical Dynamics (Chem 131C) is part of OpenChem: http://ocw.uci.edu/openchem/ This video is part of a 27-lecture undergraduate-level course titled "Thermodynamics and Chemical Dynamics" taught at UC Irvine by Professor Reginald M. Penner. Recorded June 6, 2012. Index of Topics: 0:02:54 Where Does the Arrhenius Equation Come From? 0:04:34 Transition State Theory 0:11:16 Activated Complex 0:14:30 Equilibrium Constants from Partition Functions 0:23:25 Calculating the Partition Function 0:26:28 Vibration Along the Reaction Coordinate 0:32:06 The Eyring Equation 0:35:38 Calculating the Pre-Exponential Factor in the Arrhenius Equation 0:39:27 Activities 0:40:26 Debye-Huckel Limiting Law 0:42:02 Thermodynamic Constant 0:47:25 Equation for the Kinetic Salt Effect Required attribution: Penner, Reginald Thermodynamics and Chemical Dynamics 131C (UCI OpenCourseWare: University of California, Irvine), http://ocw.uci.edu/courses/chem_131c_thermodynamics_and_chemical_dynamics.html. [Access date]. License: Creative Commons Attribution-ShareAlike 3.0 United States License. (http://creativecommons.org/licenses/by-sa/3.0/us/deed.en_US).
Views: 12870 UCI Open
4.3. Chemical Kinetics
 
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Lecture on chemical kinetics, including a discussion on rate laws, theories and reaction mechanisms. OUTLINE 4:19 Reaction rates 11:00 Rate law 13:02 Determining the rate law: isolation method 20:28 Determining the rate law: integrated rate laws 31:02 Half-life 53:23 Collision Theory 1:01:49 Transition-State Theory 1:05:43 Effect of temperature on reaction rates: the Arrhenius equation 1:11:20 Reaction mechanisms 1:19:02 Pre-equilibrium method 1:21:26 Steady-state approximation 1:31:21 Special mechanisms: Lindemann mechanism 1:39:51 Special mechanisms: Radical chain mechanisms **Note correction in discussion on reaction mechanisms: the net reaction should be 2A + B → C NOT A + B → C
Views: 12319 Sarah May Sibug-Torres
Transition state theory. Introduction
 
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9-8. This video introduces the theories of chemical reaction rates. Specifically, collision theory is briefly mentioned, but focus is placed on the fundamentals of transition state theory.
Views: 1647 Diego Troya
Steady-State Approximation
 
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Using rate constant information for a two step reaction, use steady-state approximations to determine an overall rate expression for the product formation. Made by faculty at the University of Colorado Boulder, Department of Chemical and Biological Engineering. Check out our Kinetics/Reactor Design playlists: https://www.youtube.com/user/LearnChemE/playlists?view=50&flow=list&shelf_id=7 Are you using a textbook? Check out our website for videos organized by textbook chapters: http://www.learncheme.com/screencasts/kinetics-reactor-design
Views: 50292 LearnChemE
Transition State Theory Entropy
 
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We can use transition state theory to calculate the difference in entropy between the transition state and the reactants.
General Organic Chemistry-Part 6a-Introduction to Intermediates & Transition States
 
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An intermediate is a short-lived unstable molecule in a reaction which is formed inbetween the reaction when reactants change into products. Whereas, transition state is just the state before formation of new molecule(involves breaking of bonds of reactants and formation of new ones) An intermediate differs from a transition state in that the intermediate has a discrete lifetime (be it a few nanoseconds or many days), whereas a transition state lasts for just one bond vibration cycle. Intermediates may be unstable molecules (in which case they are called reactive intermediates) or highly stable molecules. The difference between them can be better described through the energy profile diagram. In this Video I describe in detail the concept of Intermediates & Transition Sates. Transition states are local energy maximums and have partial bonds. This might be one of the reasons why they cant be isolated as intermediates.
Views: 415 C.V. Kalyan Kumar
Enzyme Kinetics of Reversible Inhibition
 
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Views: 56983 AK LECTURES
Effect of Enzymes on Rate Law and Rate Constant (Part II)
 
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Views: 26048 AK LECTURES
Transition State Theory Enthalpy
 
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We can use the activation energy of a reaction to calculate how much higher the enthalpy of the transition state is above the reactants.
Using the Hammond Postulate to describe radical chlorination
 
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Early transition states could care less what they look like, whereas late transition states have to be much more careful about the arrangements they take. Watch more of this topic at ► http://bit.ly/28OUN6O Download this PDF: http://bit.ly/28UkRRT GET MORE CLUTCH! VISIT our website for more of the help you need: http://bit.ly/28OUol2 SUBSCRIBE for new videos: http://cltch.us/1axA33X --- LET'S CONNECT! Facebook: http://cltch.us/1JLgiSZ Twitter: http://cltch.us/1NLcKpu Instagram: http://cltch.us/1If5pb7 Google+: http://cltch.us/1E34o85 Clutch Prep = Textbook specific videos to help you pass your toughest science classes.
Views: 4356 Clutch Prep
Michaelis Menten Equation and Steady State Approximation
 
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In this video we will learn an important concept of Enzyme Kinetics i.e. Michaelis Menten Equation and Steady State Approximation.
Views: 22072 All 'Bout Chemistry
Intermediates, Transition states, Potential energy diagrams (CHE)
 
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Subject : Chemistry Paper : Organic Chemistry-II Module : Intermediates, Transition states, Potential energy diagrams (CHE) Content writer :
Views: 1371 Vidya-mitra
Bio Crew_Week#1_Enzymes_Questions 1 and 2
 
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Enzymes Questions 1&2 Question 1 1) Which of the following statement is FALSE? A) Lowering the free energy of the transition state can increase a reaction rate. B) At a given temperature and time all molecules in a solution or a sample will have the same energy. C) The free energy barrier in a chemical reaction must be overcome in order for products to form. D) An increase in temperature can result in an increased reaction rate. E) An enzyme can increase a reaction rate by lowering the activation energy. Answer is: B) At a given temperature and time all molecules in a solution or a sample will have the same energy. BECAUSE.. Given particular element properties, different molecules carry different reactive properties despite being in the same solution, for example water boils at a different temperature than iron. Other statements are TRUE A. Lowering the free energy of the transition state can increase are action rate. BECAUSE... The transition state of the reaction is the peak of the activation energy. In other words by lowering the free energy of the transition state we are lowering the activation energy, therefore increasing the rate of reaction. C. The free energy barrier in a chemical reaction must be overcome for products to form. BECAUSE... True free energy is the energy needed for reaction to start and make it over the bell curve of the reaction. Once the free energy Barrier is achieve the reaction can continue to happen, depending on whether the reaction is exergonic or endergonic will tell us if the total energy of the reaction produced more energy or used more energy. D. An increase in temperature can increase in reaction rate. BECAUSE... When increasing the temperature within a chemical reaction, you are increasing rate of reaction. Increase in temperature equals an increase in energy. For example in lab, you can run a reaction by placing it over fire. E. An enzyme can increase a reaction rate by lowering the activation energy. BECAUSE... The enzyme increases the rate of reaction by Lowering the energy of the activation Question 2 2) In a favorable reaction the free energy of the products is ________ than the free energy of the reactants. Answer: LESS BECAUSE: When the product has a free energy less than the reactants (aka the substrates) then the reaction will happen much easier once free energy barrier is achieve, then it will happen spontaneously, also producing more energy than was used to activate the reaction. with a negative delta g, making it exergonic. This is because in an endergonic reaction, which has a positive delta G, energy is necessary for reaction to happen due to the free energy barrier needed to be achieved. With a products delta G still higher than the substrate, more energy was expended than was produced making it endergonic.
Views: 175 Human Biochemistry
Problem about enzyme active sites
 
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In this problem I talk about the active site of chymotrypsin, and how the mechanism works, I also discuss how the catalytic rate will change if I change the amino acids at the active site, and what the transition state should look like.
Views: 1877 FortuneFavorsPrep
An introduction to enzyme kinetics | Chemical Processes | MCAT | Khan Academy
 
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Created by Ross Firestone. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/chemical-processes/enzymes/v/allosteric-regulation-and-feedback-loops?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/chemical-processes/enzymes/v/the-six-types-of-enzymes?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 329693 khanacademymedicine
Activation Energy and Activated Complex
 
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Class 12: Chemistry: Chemical Kinetics: Activation Energy and Activated Complex
Views: 2471 Flexiguru
Derivation of Michaelis-Menten Kinetics
 
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Derives the rate expression for an enzyme reaction with a substrate to make a product using the rate-determining step approximation. Made by faculty at the University of Colorado Boulder, Department of Chemical & Biological Engineering. Check out our Kinetics/Reactor Design playlists: https://www.youtube.com/user/LearnChemE/playlists?view=50&flow=list&shelf_id=7 Check out our website for screencasts organized by popular textbooks: http://www.learncheme.com/screencasts/kinetics-reactor-design
Views: 10730 LearnChemE
Enzymes Lower Activation Energy - A Level Biology Revision Notes
 
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Enzymes Lower Activation Energy A Level Biology Revision Notes ★★★ SUBSCRIBE | LIKE | SHARE | ★★★ Enzymes Lower Activation Energy A-Level Biology Revision Notes 00:00 Intro Screen / Learning Outcomes 00:36 Enzymes are biological catalysts... 02:10 Enzymes are intracellular and extracellular... 02:40 NOTE - Know enzymes is good for synoptic essays! 03:15 Chemical reaction need energy... Enzymes Lower Activation Energy... 03:30 Activation Energy is usually provided in the form of Heat... 04:05 The peak - is the transition state... 04:35 Graph to show the amount of activation energy needed without an enzyme. 06:23 Graph to show the amount of activation energy needed WITH an enzyme. 07:11 In summary. This A-Level Biology Revision session explains that Enzymes are biological catalysts that lower the amount of activation energy needed for a chemical reaction to take place. ★ These revision sessions are useful for ALL Exam boards. Check where This Biology revision lesson this fits into your Exam Specification below... Enjoy, Frankie (ツ) ★ AQA Specification Reference: - 3.1.4.2 Many proteins are enzymes. Each enzyme lowers the activation energy of the reaction it catalyses. Students should be able to: appreciate that enzymes catalyse a wide range of intracellular and extracellular reactions that determine structures and functions from cellular to whole-organism level. ★ CIE Specification Reference: - 3 Enzymes. An understanding that an enzyme is a biological catalyst that increases the rate of a reaction and remains unchanged when the reaction is complete. 3.1 Mode of action of enzymes: a) explain that enzymes are globular proteins that catalyse metabolic reactions b) state that enzymes function inside cells (intracellular enzymes) and outside cells (extracellular enzymes). ★ Edexcel (Biology A – Salters-Nuffield) Specification Reference: - Topic 2: Genes and Health. 2.10. ii) Understand that enzymes are biological catalysts that reduce activation energy. iii) Know that there are intracellular enzymes catalysing reactions inside cells and extracellular enzymes produced by cells catalysing reactions outside of cells. ★ Edexcel (Biology B) Specification Reference: - Topic 1: Biological Molecules. 1.5 Enzymes. iii Understand that enzymes are catalysts that reduce activation energy. vii Know that enzymes catalyse a wide range of intracellular reactions as well as extracellular ones. ★ OCR (Biology A) Specification Reference: - Module 2 – Foundations in biology: 2.1.4 Enzymes. Metabolism in living organisms relies upon enzyme controlled reactions. (a) The role of enzymes in catalysing reactions that affect metabolism at a cellular and whole organism level. (b) the role of enzymes in catalysing both intracellular and extracellular reactions. (c) the mechanism of enzyme action - product formation and lowering of activation energy. ★ OCR (Biology B) Specification Reference: - Module 2 – Cells, chemicals for life, transport and gas exchange. 2.1.3 Proteins and enzymes: (c) how enzymes catalyse metabolic reactions. … the lowering of the activation energy. ★ WJEC Specification Reference: - Core Concepts: 4. Biological reactions are regulated by enzymes. Enzymes are vital in controlling metabolism in organisms. (c) enzymes acting intracellularly or extracellularly. (f) the meaning of catalysis; the lowering of the activation energy. #Biology #Enzymes #LearnBiologyNet visit learnbiology.net #Biology #Revision #LearnBiologyNet
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Little bit of theory behind Transition States
 
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Very rough and short description of some ideas behind the transition state search process. Related videos: https://www.youtube.com/watch?v=Az6gXfxftQw https://www.youtube.com/watch?v=7Jcu51bDJHY https://www.youtube.com/watch?v=mZZ6ebi8UxI
Views: 1384 IaNiusha
Arrhenius equation. Activation energy (5)
 
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Chemistry: Chemical kinetics. Arrhenius equation. Logarithms. Activation energy. Reaction energy diagram. Transition state. Catalysis This is a recording of a tutoring session, posted with the students' permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: http://www.freelance-teacher.com/videos.htm For a printable handout covering material discussed in this video series, go to my website. For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: http://www.youtube.com/watch?v=5TXnRmKCkaM&feature=PlayList&p=CF3C40740E90EDCD&index=0&playnext=1 (1) Logarithms (2) Continued (3) Arrhenius equation, activation energy (4) Continued. More on logarithms (5) Arrhenius equation continued (6) A problem (7) Graphing the Arrhenius equation (8) Another problem (9) Continued. Units (10) Reaction energy profile; transition state (11) Continued (12) A problem (13) Catalysts tags: education college student students university exam test educational study campus school class
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Activation Energy
 
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Chemistry_c-9-10-chem-ener-15.mp4
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Catalysts | Kinetics | Chemistry | Khan Academy
 
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How a catalyst speeds up a reaction by lowering the activation energy. Watch the next lesson: https://www.khanacademy.org/science/chemistry/nuclear-chemistry/radioactive-decay/v/mass-defect-and-binding-energy?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry Missed the previous lesson? https://www.khanacademy.org/science/chemistry/chem-kinetics/arrhenius-equation/v/mechanisms-and-the-rate-determining-step?utm_source=YT&utm_medium=Desc&utm_campaign=chemistry Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Chemistry channel: https://www.youtube.com/channel/UCyEot66LrwWFEMONvrIBh3A?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy