For the manufacture of Ammonia by Haber's process, write the equation and optimum conditions for maximum yield of ammonia. 

Explanation

In large scale Ammonia is manufactured by Haber.s process. It involves the direct combination of nitrogen and hydrogen to form ammonia.
`N_(2)(g)+3H_(2)(g)hArr 2NH_(3)(g), Delta=-"46.1 kJ mol"^(-1)`
This reaction is reversible and exothermic.
According to Le Chatelier.s principle, the formation of ammonia is favoured by
i) High pressure of about 200 atm.
ii) A moderate temperature of 773K
iii) Iron oxide is used as catalyst with small amounts of `K_(2)O` and `Al_(2)O_(3)` as a promoters to increase the rate of attainment of equilibrium.