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.

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) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

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.

Q. 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.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

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.

Q. 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.