How do size of particles of adsorbent, pressure of gas and prevailling temperature influence the extent of adsorption of a gas on a solid ?

Explanation

(i) Smaller the size of the particles of adsorbent, greater is the surface area and hence greater is the adsorption.
(ii) At constant temperature, adsorption first increases with increase of pressure and then attains equilibrium at high pressure and becomes constant.
(iii) In physical adsorption, it decreases with increase of temperature but in chemisorption, it first increases becomes maximum and then decreases.