Question

The heat liberated during adsorption of a gas on a solid is 300 kJ mol⁻¹. Predict the nature of adsorption.

Answer 1

The heat of adsorption is 300 kJ mol⁻¹, which is very high, indicating chemisorption. It involves strong chemical bonds and high heat release, unlike physisorption (20-40 kJ mol⁻¹). Thus, adsorption is chemical, irreversible, and highly specific in nature.