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Chemistry Question on Thermodynamics terms

A reaction, A+B→C+D+qA+B→C+D+q is found to have a positive entropy change. The reaction will be

A

possible at high temperature

B

possible only at low temperature

C

not possible at any temperature

D

possible at any temperature

Answer

possible at any temperature

Explanation

Solution

For a reaction to be spontaneous, ∆G∆G should be negative.
∆G=∆H–T∆S∆G = ∆H – T∆S
According to the question, for the given reaction,
∆S∆S = positive
∆H∆H = negative (since heat is evolved)
⇒ ∆G∆G = negative
Therefore, the reaction is spontaneous at any temperature.

Hence, the correct option is (D): possible at any temperature.