A heat engine absorbs of heat from a source at and rejects of heat to a sink at in…

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

Problem

A heat engine absorbs

4.0 \times 10^{3}\,\text{J}

of heat from a source at

500\,\text{K}

and rejects

3.0 \times 10^{3}\,\text{J}

of heat to a sink at

300\,\text{K}

in one complete cycle. Calculate the change in entropy of the universe,

\Delta S_{\text{univ}}

, for this cycle. Give your answer in

\text{J\,K}^{-1}