Physics

Problem

A closed system at

450\,\text{K}

holds

800\,\text{J}

of energy that can be supplied to a heat engine exhausting into a

300\,\text{K}

environment. Before the engine operates, an irreversible internal process increases the system’s entropy by

0.40\,\text{J/K}

but leaves its energy unchanged. Determine the maximum amount of work the engine can now deliver.