Chapter 15, Problem 15.33P

Nitric oxide emitted from the engines of supersonic aircraft can contribute to the destruction of stratospheric ozone:
$NO(g)+O_3(g)\underset{k_r}{\overset{k_f}{\rightleftarrows }}N{O}_2(g)+O_2(g)$
Nitric oxide emissions from supersonic aircraft can contribute to destruction ofthe ozone layer.
This reaction is highly exothermic $(\Delta H=-201kj)$ , and its equilibrium constant $k_c$ is $3.4\times {10}^{34}$ at 300 K.
(a) Which rate constant is larger? $k_{f}or$ $k_r$
(b) The value of $k_f$ at 300 K is $8.5\times {10}^6{M}^{-1}{s}^{-1}$ . What is the value of $k_r$ at the same temperature?