Question

The reaction and rate law for the gas-phase decomposition ofdinitrogen pentaoxide are 2 N2O5(g) ---> 4 NO2(g) + O2(g), rate= k[N2O5]. Which of the following can be considered a validmechanism(s) for the reaction?

A) 2{ N2O5(g) ---> NO3(g) + NO2(g) } [slow]
2{ NO3(g) ---> NO2(g) + O(g) } [fast]
2O(g) ---> O2(g) [fast]

B) 2N2O5(g) ---> N4O10(g) [slow]
N4O10(g) ---> 4NO2(g) + O2(g) [fast]

C) 2N2O5(g) ---> 4NO2(g) + O2(g)

D) N2O5(g) NO3(g) + NO2(g) [fast, reversible]
NO2(g) + N2O5(g) ---> 3NO2(g) + O(g) [slow]
NO3(g) + O(g) ---> NO2(g) + O2(g)[fast]