A heat engine works between a hot reservoir at and a cold reservoir at

PHYSICS · Subjective · A Level · Physics · Engineering physics · Engineering physics

Problem

A heat engine works between a hot reservoir at

T_H = 500\,\text{K}

and a cold reservoir at

T_C = 300\,\text{K}

. It claims an efficiency of

50\%

. State whether this claim is possible or impossible, giving a numerical justification.