Four heat engines claim the following performance for each complete cycle: P: Absorbs…

PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics

Problem

Four heat engines claim the following performance for each complete cycle: P: Absorbs

500\,\text{J}

500\,\text{K}

and does

160\,\text{J}

of work while rejecting the rest at

300\,\text{K}

Q: Absorbs

600\,\text{J}

600\,\text{K}

and does

260\,\text{J}

of work while rejecting the rest at

350\,\text{K}

R: Absorbs

500\,\text{J}

550\,\text{K}

and does

180\,\text{J}

of work while rejecting the rest at

330\,\text{K}

S: Absorbs

900\,\text{J}

650\,\text{K}

and does

300\,\text{J}

of work while rejecting the rest at

300\,\text{K}

Which one of the above engines is thermodynamically impossible? (a) S (b) P (c) Q (d) R