Chapter 15, Problem 50E

Nitrogen dioxide reacts with itself according to the reaction:

   ${\text{2NO}}_{\text{2}}\left(\text{g}\right)\rightleftharpoons {\text{N}}_{\text{2}}{\text{O}}_{\text{4}}\left(\text{g}\right)$K_p= 6.7 at 298 K

A 2.25-L container contains 0.055 mol of NO₂ and 0.082 mol of N₂O₄ at 298 K. Is the reaction at equilibrium? If not, in what direction will the reaction proceed?