Question

What are the factors which influence the adsorption of a gas on a solid?​

Answer 1

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:

Answer 2

(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.

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