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Mechanism of Adsorption

Adsorption of...

Question

Adsorption of gases on solid surface is generally exothermic because

A

Enthalpy is positive

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B

Entropy decreases

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C

Entropy increases

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D

Free energy increase

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Solution

The correct option is B
Entropy decreases

Due to randomness of particles is reduced since entropy decreases

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Similar questions

Q. Adsorption of a gas on the surface of solid is generally accompained by a decrease in entropy. Still a spontaneous process. Explain.

Q. Adsorption of gases on solid surface is exothermic because:

Q. The correct statement(s) pertaining to the adsorption of a gas on a solid surface is(are):
(i) adsorption is always exothermic.

(ii) physisorption may transform into chemisorption at high temperature.
(iii) physisorption increases with increasing temperature but chemisorption decreases with increasing temperature.
(iv) chemisorption is more exothermic than physisorption, however, it is very slow due to the higher energy of activation.

Q. For a reaction taking place in a container in equilibrium with its surroundings, the effect of temperature on its equilibrium constant K in terms of change in entropy is described by:

Q. Assertion :Adsorption is exothermic and spontaneous inspite of the fact that adsorption is accompained with decrease in entropy. Reason: The factor

T Δ S

Δ H

.

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