110228 - Effect of temperature and Potential Energy Surface...

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1 CHM3400 - Lecture 22 Feb 28 Effect of temperature and Potential Energy Surface (PES) (Chapter 9 332-336) Temperature Arrhenius equation PES Kinetics and thermodynamics
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2 Effect of temperature on k Different behavior, depending on the type of reaction: Higher T higher collision rate higher k Above melting point T denaturing of enzyme lower k What type of reaction is this? Rare!
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3 Arrhenius equation = RT E A k a exp Frequency factor , related to the frequency of collisions between the analyte molecules Activation energy (= minimum energy to intiate reaction) What type of a reaction is this? How do we get a straight line plot?
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4 Renaturing of DNA RT E A k a = ln ln How is A determined? What does this represent? 1 1 ln ln RT E A k a = 2 2 ln ln RT E A k a = = 1 2 1 2 1 1 ln T T R E k k a At 2 different temperatures:
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5 H + H 2 H 2 + H For the simple reaction: H A + H B -H
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This note was uploaded on 05/29/2011 for the course CHM 3400 taught by Professor Seabra during the Spring '08 term at University of Florida.

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110228 - Effect of temperature and Potential Energy Surface...

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