Question

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

Answer 1

1. The smaller the size of the particles of the adsorbent, greater is the surface area, greater is the adsorption.
2. At constant temperature, adsorption first increases with increase in pressure and then attains equilibrium at high pressures.
3. In physical adsorption, it decreases with increase in temperatures, but in chemisorption first, it increases and then decreases.