試題詳解

19. The experimental rate law for the decomposition of nitrous oxide (N₂O) to N₂ and O₂ is Rate = k[N₂O]². Two mechanisms are proposed:

I: N₂O → N₂ + O

N₂O + O → N₂ + O₂

II: 2N₂O → N₄O₂

N4O₂→ 2N₂ + O₂ 

Which of the following could be a correct mechanism?
(A) mechanism I with the first step as the rate-determining step
(B) mechanism I with the second step as the rate-determining step
(C) mechanism II with the second step as the rate-determining step
(D) two of these could be correct
(E) none of these could be correct.