Question

Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction ?
A. Exothermic and decreasing disoder
B. Endothermic and increasing disorder
C. Exothermic and increasing disorder
D. Endothermic and decreasing disorder

Answer 1

Correct Answer - C
If reaction is exothermic , therefore `DeltaH` is negative and on increasing disorder, `DeltaS` is positive thus, at these condition, `DeltaG` is negative according to following equation
`DeltaG=DeltaH-TDeltaS`
`DeltaG` = negative, and for spontaneous reaction `DeltaG` must be negative.