When a certain system is in a state of equilibrium both the forward and the backward processes proceed at the same speed i.e. it is of dynamic nature. Le Chatelier's principle helps in controlling the conditions of temperature, pressure and concentration which govern the system.
(i) State the principle.
(ii) The manufacture of ammonia is based on which industrial process.
(iii) What is the condition of temperature for the process ?
(iv) What is the value associated with the optimum temperature for the process ?

Explanation

(i) For the statement of the principle , consult section 7.13.
(ii) It is known as Haber's process
(iii) Low temperature favours the formation of ammonia.
(iv) The optimum temperature for the manufacturing process is `750` K . In case higher temperature is provided this will favour the reverse process i.e., yield of ammonia will decrease instead of getting increased upon further heating.