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Rate determining step

by VenaCava
Tags: determining, rate, step
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VenaCava
#1
Dec1-13, 10:01 PM
P: 20
For a multi-step reaction, how is the rate determining step defined.
Is it
-the step with the highest activation barrier OR
-the step with the highest transition state energy

[IMG]www.chemistry.msu.edu/faculty/reusch/virttxtjml/Images/2steprx.gif[/IMG]

For example, I found this picture online. The first step has a higher barrier, but the second step has a higher energy TS.

Thanks
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