Discuss the effect of temperature on the degree of adsorption of `N_(2)` on the surface of iron.

Explanation

At room temperature, practically there is no adsorption of `N_(2)` gas on the surface of iron. At 83 K, nitrogen is physically adsorbed on the surface of iron. Its degree of adsorption decreases with rise in temperature and becomes almost nil at room temperature. At 773 K and above, there is chemical adsorption of nitrogen on the surface of iron.