CHEM 4025 Study Guide - Final Guide: Sorption, Physisorption, Central Board Of Secondary Education
Document Summary
It is the substance which is being adsorbed on the surface of another substance: adsorbent: It is the substance present in bulk, on the surface of which adsorption is taking place: desorption: When adsorption and absorption take place simultaneously, it is called sorption: enthalpy or heat of adsorption: Since, adsorption occurs with release in energy, i. e. , it is exothermic in nature. The enthalpy change for the adsorption of one mole of an adsorbate on the surface of adsorbent is called enthalpy or heat of adsorption: types of adsorption: There are different types of adsorption namely: physical adsorption, chemical adsorption. Co2, gas adsorbed to greater extent than h2 and he. Higher the critical temperature of gas, more will be the extent of adsorption. (v) the extent of adsorption increases with increase in surface area, e. g. porous and finely divided metals are good adsorbents. Factors affecting adsorption of gases on solids: nature of adsorbate:
