The Difference Between Adsorption and Absorption
| Criteria |
Absorption |
Adsorption |
| Definition |
Assimilation of the molecular system throughout the bulk of the solid or liquid medium. |
Accumulation of molecular species at the bottom instead of the liquid or solid. |
| Phenomenon |
A bulk phenomenon. |
A surface phenomenon. |
| Heat exchange |
Endothermic process |
Exothermic process |
| Temperature |
The temperature has no effect. |
Influenced by low temperature |
| Rate of reaction |
Occurs at a uniform rate. |
Increases steadily and reaches equilibrium. |
| Concentration |
It is constant throughout the medium. |
The Concentration at the bottom of adsorbent is different from that in bulk. |
