Assertion: A reaction which is spontaneous and accompanied by decrease of randomness must be exothermic. Reason: All exothermic reactions are accompanied by decrease of randomness.

Question

Assertion: A reaction which is spontaneous and accompanied by decrease of randomness must be exothermic. Reason: All exothermic reactions are accompanied by decrease of randomness. (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

Δ G=Δ H-T Δ S -v e=Δ H-[T(- v e)] (as spontaneous) Exothermic reactions may be accompanied by increase or decrease of randomness.

Q. Assertion: A reaction which is spontaneous and accompanied by decrease of randomness must be exothermic.
Reason: All exothermic reactions are accompanied by decrease of randomness.

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.

$Δ G = Δ H - T Δ S$

$- v e = Δ H - [T (- v e)]$ (as spontaneous)

Exothermic reactions may be accompanied by increase or decrease of randomness.

Q. Assertion: A reaction which is spontaneous and accompanied by decrease of randomness must be exothermic. Reason: All exothermic reactions are accompanied by decrease of randomness.