In which of the following conditions, a reaction will definitely be spontaneous:

Question

In which of the following conditions, a reaction will definitely be spontaneous: (A) Exothermic and increasing disorder (B) Exothermic and decreasing disorder (C) Endothermic and increasing disorder (D) Endothermic and decreasing disorder

Tardigrade Admin · Accepted Answer

For a spontaneous reaction, Δ G < 0. As per the Gibbs-Helmholtz equation, Δ G=Δ H-TΔ S When Δ H is negative, i.e., the reaction is exothermic and Δ S is positive, i.e., the disorder is increasing, the value of Δ G will definitely be negative and the process will be spontaneous for all temperatures.

Q. In which of the following conditions, a reaction will definitely be spontaneous:

Exothermic and increasing disorder

Exothermic and decreasing disorder

Endothermic and increasing disorder

Endothermic and decreasing disorder

For a spontaneous reaction, ΔG<0. As per the Gibbs-Helmholtz equation, ΔG=ΔH−TΔS When ΔH is negative, i.e., the reaction is exothermic and ΔS is positive, i.e., the disorder is increasing, the value of ΔG will definitely be negative and the process will be spontaneous for all temperatures.