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Karnataka Board PUCPUC Science 2nd PUC Class 12

Give Reasons for the Following Observations: Physisorption Decreases with Increase in Temperature.

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Questions

Give reasons for the following observations:

Physisorption decreases with increase in temperature.

Why does physisorption decrease with the increase of temperature?

Short/Brief Note
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Solution

Physisorption is exothermic in nature:

\[\ce{\underset{(Adsobent) (Adsobate)}{Solid + Gas}⇌\underset{(Gas adsorbed on solid)}{Gas/Solid + Heat}}\]

In accordance with Le Chatelier’s principle, physisorption decreases with an increase in temperature. Because the equilibrium will shift in the backward direction, gas will be released from the adsorbed surface.

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2014-2015 (March) Panchkula Set 1
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