Question

The percentage of ammonia obtainable, if equilibrium were to be established during the Haber process, is plotted against the operating pressure for two temperatures, 400ºC and 500ºC. Which of the following graph correctly represent the two process ?

• A.
• B.
• C.
• D.

Answer 1

Answer: (A)

Answer 2

N₂(g) + 3H₂(g) $\rightleftharpoons$ 2NH₃(g); DH < 0

By Le-Chatelier principle, higher pressure and lower temperature favour the forward reaction, i.e., higher % of NH₃.