Q. Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction ?
A) Exothermic and decreasing disorder
B) Endothermic and increasing disorder
C) Exothermic and increasing disorder
D) Endothermic and decreasing disorder
Explanation
[Solution from source] With ΔH < 0 (exothermic) and ΔS > 0 (increasing disorder), ΔG = ΔH − TΔS is negative at every temperature. The other combinations are spontaneous only in some temperature range or never. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.