Ammonia gas is manufactured industrially from `N_(2)`and`H_(2)` by the

Options

A. Contact process
B. Haber process
C. Ostwald process
D. Solvay process

Answer

2

Explanation

On a large scale, ammonia is manufactured by Haber's process:
`N_(2)(g)+3H_(2)(g) hArr 2NH_(3)(g)" "Delta_(f)H^(odot)=-46.1" kJ mol"^(-1)`
In accordance with `Le` chatelier's principle, high pressure (because `Deltan_(g)` is negative) and low tempweature (because `DeltaH` is negative) would favour the formation of ammonia. In the Haber process ,a good yield of ammonia is obtained in a resonable time by carrying out the reaction under optimum condition ,i.e.,a pressure of about`200`atm `(200xx10^(5) Pa)` a temperature of `400-500^(@)C` and the use of a catalyst such as iron oxide with small amounts of `K_(2)O` and `Al_(2)O_(3)` to increase the rate of attainment of equlibrium .