Q. Ostwald's process for manufacture of nitric acid involves the reaction, $4 NH _{3( g )}+5 O _{2(g)} \rightleftharpoons 4 NO _{(g)}+6 H _{2} O _{( l )}$ $\Delta H=+Q\, kJ$. Which of the following factors will not affect the concentration of $NH _{3}$ at equilibrium?
Equilibrium
Solution: