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Question: Two heat engines A and B have their sources at 1000 K and 1100 K and their sinks are at 500 K and 40...

Two heat engines A and B have their sources at 1000 K and 1100 K and their sinks are at 500 K and 400 K respectively. What is true about their efficiencies?

A

hA = hB

B

hA>hB

C

hA<hB

D

Cannot predict.

Answer

hA<hB

Explanation

Solution

hA = 1 – 5001000\frac { 500 } { 1000 } ;hB = 1 – 4001100\frac { 400 } { 1100 } hA < hB