Q. 24.6( 40 Votes )

Why does physisorption decrease with the increase of temperature?

Answer :

As Physisorption is Exothermic in nature, which means when gas gets adsorbed on the solid surface, Heat is evolved. So, according to Le-Chatelieres when the temperature is an increased reverse process (Desorption) will be favoured. So, Physisorption decreases with the increase of temperature.

Where x/m: Volume of gas adsorbed

T: Temperature.

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