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
A. Exothermic and decreasing disoder
B. Endothermic and increasing disorder
C. Exothermic and increasing disorder
D. Endothermic and decreasing disorder
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.