Question

A carnot engine, having efficiency of η = 1/10 as heat engine, is used as a refrigerator. If the work done on the system is 10J, Then find the amount of energy absorbed from the reservoir at lower temperature.

Answer 1

As heat engine, let Q₁ be the heat energy absorbed from the source and Q₂ be the energy rejected to the sink. then

Q₁ = W + Q₂ = 10 + Q₂  ...... (1)

From equation (1) and (2)