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Why are Mechanisms involving Enzyme/Catalysts Zero Order?

Posted: Sat Mar 17, 2018 2:42 pm
by Isa Samad 1L
I have in my notes from lecture that enzymes and catalysts are zero order with regards to mechanisms. Why is this? Don't enzymes/catalysts make the rate faster by creating a pathway of lower activation energy and thereby, affect the rate of a reaction?

Re: Why are Mechanisms involving Enzyme/Catalysts Zero Order?

Posted: Sat Mar 17, 2018 4:47 pm
by Oscar Beltran 3H
A zero-order reaction means that the reaction's rate is independent on the concentration of reactant/reactants. It makes sense in reactions with enzymes to be zero order because when enzymes are used, the reaction's rate will depend only on the rate at which the enzyme can make the reaction proceed.