Q. The efficiency of a fuel cell is given by
A) ΔG/ΔS
B) ΔG/ΔH
C) ΔS/ΔG
D) ΔH/ΔG
Explanation
[Solution from source] A fuel cell converts the free-energy change into electrical work, while the total energy released is ΔH; efficiency = ΔG/ΔH. Ratios involving ΔS are not an efficiency. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.