Lec25 - Reaction order Molecularity of a reaction First...

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Unformatted text preview: Reaction order Molecularity of a reaction First order reactions unimolecular reactions Second order reactions bimolecular reactions Chemical kinetics First order irreversible reaction The rate is dependent on the concentration of A (reacting molecule and k (rate constant) No reverse reaction unimolecular reaction: v (mol/liter.sec) k (sec-1 ) bimolecular reaction k (liter/mol.sec) Velocity is proportional to the concentration of the reactant First Order Reaction How do we determine k? If a reaction is first order, the plot of ln[A] vs t would be a straight line; Slope is -k, anthe intercept is ln[A0] t 1/2 = the time in which half the substrate is converted Half life is constant for a first order reaction Bimolecular reactions k (liter/mol.sec) Pseudo first order reactions Rates of catalyzed versus non- catalyzed reactions Michaelis-Menten Equation V = rate early in the reaction V max is the maximal rate K m is a constant that is characteristic for the enzyme [S] is the substrate concentration...
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This note was uploaded on 10/28/2010 for the course CHEM 114A taught by Professor Viadhiu during the Fall '08 term at UCSD.

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Lec25 - Reaction order Molecularity of a reaction First...

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