Question

Discuss the effect of pressure and temperature on the adsorption of gases on solids.

Answer 1

Effect of pressure on the adsorption of gases on solids:
When temperature is constant and pressure is increased, the extent of adsorption increases. This is in accordance with Le chatelier's principle.
Effect of temperature on the adsorption of gases on solids:
Adsorption is an exothermic process as heat is evolved during adsorption. With increase in temperature, the extent of adsorption will decrease. This is in accordance with Le chatelier's principle.
Desorption is an endothermic process as heat is absorbed during desorption. With increase in temperature, the extent of desorption will increase. This is in accordance with Le chatelier's principle.