Nitrogen Pentoxide Decomposition Consider the decomposition of nitrogen pentoxide into nitrogen dioxide and oxygen, N2O5 → 2 NO2 + ½ O2 R1 This is not an elementary reaction and its mechanism consists of the following set of elementary reactions. N2O5 → NO3 + NO2 R1a NO2 + NO3 → N2O5 R1b NO2 + NO3 → NO2 + O2 + NO R1c NO + NO3 → 2NO2 R1d The rate constants for the reactions R1a, R1b, R1c and R1d are denoted as k1, k2, k3 and k4, respectively. Here, NO and NO3 are regarded as the intermediate species. (a) Derive the rate expression for the overall reaction R1 from its mechanism (R1a-d) using the pseudo- steady state approximation. (b) What is the overall order of the reaction? Explanation: Pseudo steady state is similar to the rate determination done for catalytic reactions
Nitrogen Pentoxide Decomposition Consider the decomposition of nitrogen pentoxide into nitrogen dioxide and oxygen,
N2O5 → 2 NO2 + ½ O2 R1
This is not an elementary reaction and its mechanism consists of the following set of elementary reactions.
N2O5 → NO3 + NO2 R1a
NO2 + NO3 → N2O5 R1b
NO2 + NO3 → NO2 + O2 + NO R1c
NO + NO3 → 2NO2 R1d
The rate constants for the reactions R1a, R1b, R1c and R1d are denoted as k1, k2, k3 and k4, respectively. Here, NO and NO3 are regarded as the intermediate species. (a) Derive the rate expression for the overall reaction R1 from its mechanism (R1a-d) using the pseudo- steady state approximation. (b) What is the overall order of the reaction?
Explanation: Pseudo steady state is similar to the rate determination done for catalytic reactions
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