Question

What are factirs which influence adsorption of a gasvon a solid?

Answer 1

Factors Affecting The Adsorption of Gases by Solids. Following are the factors which influence the adsorption of gases by solids. Adsorption being a surface phenomenon, the extent of adsorption depends upon the surface area. Increase in the surface area of the adsorbent, increases the total amount of gas adsorb
ed.

Answer 2

Answer:

There are various factors that affect the rate of adsorption of a gas on a solid surface.  

(1) Nature of the gas:

Easily liquefiable gases such as NH3, HCl etc. are adsorbed to a great extent in comparison to gases such as H2, O2 etc.

This is because Van der Waal’s forces are stronger in easily liquefiable gases.  

(2) Surface area of the solid:

The greater the surface area of the adsorbent, the greater is the adsorption of a gas on the solid surface.  

(3) Effect of pressure:

Adsorption is a reversible process and is accompanied by a decrease in pressure.  

Therefore, adsorption increases with an increase in pressure.  

(4) Effect of temperature:  

Adsorption is an exothermic process.

Thus, in accordance with Le-Chatelier’s principle, the magnitude of adsorption decreases with an increase in temperature.