Physics

Problem

Three ideal heat engines operate between the same cold reservoir at 300 K and different hot reservoirs as given below: Engine A:

T_H = 500\,\text{K}

Engine B:

T_H = 600\,\text{K}

Engine C:

T_H = 650\,\text{K}

Which engine can, at most, achieve the highest efficiency? a) Engine B b) Engine A c) Engine C d) All three have the same efficiency