Adsorption

absorption

Assimilation of molecular species throughout the bulk of the solid or liquid is termed as absorption.

Accumulation of the molecular species at the surface rather than in the bulk of the solid or liquid is termed as adsorption.

Endothermic process

Exothermic process

It occurs at a uniform rate.

It steadily increases and reach to equilibrium

It is not affected by temperature

It is favoured by low temperature