A reaction proceeds by the following three-step mechanism with elementary rate coefficients,

Question

k.
A + B → C k 1
C → A + B k -1
C → B + D k 2
(C is a chemical radical)

(ii) By applying the Steady State Approximation determine the overall order of the
reaction.

(iii)What is the value of kOBS, the observed rate coefficient, at 800K given that the
elementary rate coefficients are as follows:
k l = 1011 exp -( 1 0 0 0 0 / RT )dm3mol-1s-1.
k-1 = 1015 exp –(40000/RT) s-1
k2 = 1013exp –(30000/RT) s-1