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Adsorption is accompanied by :-...

Adsorption is accompanied by :-

A

decrease in enthalpy of the system

B

increase in enthalpy of the system

C

decrease in free energy of the system

D

`T Delta S` for the process is positive.

Text Solution

Verified by Experts

The correct Answer is:
A, C
As adsorption is spontaneous, `DeltaG` for the process is -ve . Adsorption is accompanied by decrease in randomness, therefore `DeltaS` and `TDeltaS` for the process is also negative. As `DeltaS` for the process is -ve and the process is spontaneous, `DeltaH` for the process the to be -ve i.e, enthalpy of the system decrease.
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Knowledge Check

  • In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): At the equilibrium position in the process of adsorption AH = TAS. Reason (R): Adsorption is accompanied by decrease in surface energy.

    A
    Both A and Rare true and R is the correct explanation of A
    B
    Both A and R are true but explanation of A
    C
    A is true but R is false
    D
    A is false and R is True

  • In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): At the equilibrium position in the process of adsorption AH = TAS. Reason (R): Adsorption is accompanied by decrease in surface energy.

    A
    Both A and Rare true and R is the correct explanation of A
    B
    Both A and R are true but R is not correct explanation of A
    C
    A is true but R is false
    D
    A is false and R is True

  • Assertion: Adsorption is exothermic and spontaneous in spite of the fact that adsorption is accompanied with deccrease in entropy. Reason: The factor TDeltaS is lesser than DeltaH

    A
    If both the assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both the assertion and reason are true but reason is not the correct explantion of the assertion.
    C
    If the assertion is true but reason is false.
    D
    If assertion is false but reason is true.

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