Question

For the following reaction, state the order with respect to the reactant and the overall order.

\[\ce{2NO2_{(g)} -> 2NO_{(g)} + O2_{(g)}}\] Rate = k[NO₂]²

Answer 1

For the reaction

\[\ce{2NO2_{(g)} -> 2NO_{(g)} + O2_{(g)}}\]

and the given rate law

Rate = k[NO₂]²

Order with respect to the reactant NO₂:

The exponent of [NO₂] in the rate law is 2

Therefore, the order with respect to NO₂ = 2

Overall order of the reaction:

Since NO₂ is the only reactant in the rate law, and its exponent is 2,

The overall order of the reaction = 2