Question

Which of the mentioned conditions will favor synthesis of Ammonia by Haber’s process?

(a) High temperature and High pressure

(b) Low temperature and High pressure

(c) High temperature and Low pressure

(d) Low temperature and Low pressure

The question was asked at a job interview.

Origin of the question is Inorganic Chemical in section Inorganic Chemical Industries of Chemical Technology

Answer 1

Correct choice is (b) Low temperature and High pressure

Explanation: According to Le Chatlier principle forward reaction is favorable when pressure is high, i.e. equilibrium shifts to right, which gives more Ammonia. Since the reaction is exothermic, Low temperature will favor the reaction. So Low temperature and High-pressure favors the synthesis.