If an endothermic reaction occurs spontaneously at constant temperature T and P , then which of the following is true ?

Question

If an endothermic reaction occurs spontaneously at constant temperature T and P , then which of the following is true ? (A) Δ G > 0 (B) Δ H < 0 (C) Δ S > 0 (D) Δ S < 0

Tardigrade Admin · Accepted Answer

For endothermic reaction Δ H is positive ie, Δ H > 0. For a spontaneous process Δ G is always Negative and Δ G = Δ H - TΔ S = thus, to maintain the value of Δ G negative, Δ S must be positive ie, Δ S > 0.

Q. If an endothermic reaction occurs spontaneously at constant temperature $T$ and $P$ , then which of the following is true ?

$Δ G > 0$

$Δ H < 0$

$Δ S > 0$

$Δ S < 0$

For endothermic reaction $Δ H$ is positive ie, $Δ H > 0$ .
For a spontaneous process $Δ G$ is always Negative and $Δ G = Δ H - T Δ S =$ thus, to maintain the value of $Δ G$ negative, $Δ S$ must be positive ie, $Δ S > 0$ .

Q. If an endothermic reaction occurs spontaneously at constant temperature T and P , then which of the following is true ?

ΔG>0

ΔH<0

ΔS>0

ΔS<0