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Spontaneity

Assertion :Sp...

Question

Assertion :Spontaneous process is an irreversible process and may be reversed by some external agency. Reason: Decrease in enthalpy is a contributory factor for spontaneity.

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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C

Assertion is correct but Reason is incorrect

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D

Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
A process is spontaneous when $Δ G < 0$ .

$Δ G = Δ H - T Δ S$ .

When $Δ H < 0$ , it may lead to negative value for $Δ G$ .

A spontaneous process is an irreversible process and may be reversed by some external agency.
The decrease in enthalpy is a contributory factor for spontaneity.

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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