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During the adsorption of krypton on acti...

During the adsorption of krypton on activated charcoal at low temperature ………..

A

`DeltaHgt0` and `DeltaSlt0`

B

`DeltaHlt0` and `DeltaSlt0`

C

`DeltaHgt0` and `DeltaSgt0`

D

`Deltalt0` and `DeltaSgt0`

Text Solution

Verified by Experts

The correct Answer is:
B
During adsorption, there is always a decrease in residual forces of the surface i.e., there is decrease in surface eneregy which appears as heat. Adsorption, therefore, is invariably accompanied by evolution of heat i.e., it is an exothermic process, when a gas is adsorbed, the freedon of process, when a gas is adsorbed, the freedom of movement of its molecules becomes restricted. This amounts to decrease in entropy of the gas after adsorption i.e. `DeltaD` is negative. Adsorption is thus, accompanied by decrease in enthalpy as well as decrease in entropy of the system.
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