What are the factors which influence the adsorption of a gas on a solid?
Answers
Answer:
Nature and surface area of adsorbent: Greater the surface area of the adsorbent, greater is the volume of gas adsorbed. ...
Temperature: It is observed that the adsorption decreases with the increase of temperature. ...
Pressure: ...
Activation of the solid adsorbent:
(1) Nature of the gas:
There is a strong Van der Waal’s forces in easily liquefiable gases hence, easily liquefiable gases such as NH3, HCl etc. are adsorbed to a great extent in comparison to gases such as H2, O2 etc.
(2) Surface area of the solid
The adsorption rate of a gas on the solid surface increases with the increase in the surface area of the adsorbent.
(3) Effect of pressure
Adsorption increases with an increase in pressure and, as a result adsorption is a reversible process and is accompanied by a decrease 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.