Explain graphical representation of chemical adsorption and physical adsorption.

Explanation

(i) Adsorption isotherms the variation of adsorption at constant temperature .
(ii) When amount of adsorption is plotted versus temperature at constant presure is called adsorption isobar.

(iii) In physical adsorption `x//m` decreases with in T. But in chemical adsorption `x//m` increases with rise in temperature and then decreases. The decrease at high temperature is due to desportion as the kinetic energy of the adsorbate increase.