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Energy Diagrams
15. Chemical Kinetics / Energy Diagrams / Problem 3

The energy diagram for the reaction of NO2 with CO is

The overall reaction is 

NO2 + CO → NO + CO2 

with the following proposed mechanism

step 1: NO2 + NO2 → NO + NO3

step 2: NO3 + CO → NO+ CO2

Determine the rate-limiting step

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