Assertion (A): Adsorption is an exothermic pr | vedclass

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(B) Both Assertion $(A)$ and Reason $(R)$ are correct,but Reason $(R)$ is not the correct explanation of Assertion $(A)$.Adsorption is an exothermic p

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Both $A$ and $R$ are correct but $R$ is not the correct explanation of $A$.

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(B) Both Assertion $(A)$ and Reason $(R)$ are correct,but Reason $(R)$ is not the correct explanation of Assertion $(A)$.Adsorption is an exothermic process because when a gas is adsorbed on a solid surface,the residual forces of the surface decrease,leading to a decrease in enthalpy $(\Delta H The spontaneity of the process is governed by the Gibbs free energy equation: $\Delta G = \Delta H - T \Delta S$.Since the movement of gas molecules is restricted upon adsorption,entropy decreases $(\Delta S The reversibility of physisorption (Reason) is a characteristic property of physical adsorption but does not explain why the process is exothermic.

Assertion $(A)$: Adsorption is an exothermic process.
Reason $(R)$: Physisorption of a gas on a solid surface is normally reversible.

Similar Questions

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Give an example where physisorption changes to chemisorption with rise in temperature. Explain the reason for change.

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Assertion $(A)$: Adsorption is an exothermic process.Reason $(R)$: Physisorption of a gas on a solid surface is normally reversible.