Describe the industrial applications of hydrogen which depend on the heat liberated when its atoms are made to combine on the surface of a metal,

Explanation

a. The atomic hydrogen torch is melt some of the most refractory materials such as for the production of organic chemicals e.g. methanol by reaction.
`Oils+H_(2)overset(Ni,H_(2))underset(175^(@).5atm)to Solid fats`
`CO+2H_(2)overset("Cobalt")underset("catalyst")tounderset(("methanol"))(CH_(3)OH)`
c. Its ability to unit with nitrogen in the presence of `Fe` as catalyst and `Mo` as promoter at `675 K` under `200 atm` results in the production of ammonia by haber's process.
`N_(2(g))+3H_(2(g))overset(675 K,200 atm)underset(Fe//Mo)to2NH_(3(g))`