Chapter 15, Problem 119E

At 473 K, for the elementary reaction $\text{2NOCl}\left(\text{g}\right)\underset{k_{-1}}{\overset{k_1}{\rightleftharpoons }}\text{2NO}\left(\text{g}\right)+{\text{Cl}}_{\text{2}}\left(\text{g}\right)$

${\text{K}}_{\text{1}}=\text{7}.\text{8}\times \text{1}{0}^{-\text{2}}\text{L}/\text{mol s and}$

${\text{K}}_{-}{}_{\text{1}}=\text{4}.\text{7}\times \text{1}{0}^{\text{2}}{\text{L}}^{\text{2}}/{\text{mol}}^{\text{2}}\text{s}$

A sample of NOCI is placed in a container and heated to 473 K. When the system comes to equilibrium, [NOCI] is found to be 0.12 mol/L. What are the concentrations of NO and Cl₂?