A certain amount of gas initially occupying a volume V 0 at a pressure P 0 and a temperature T 0 expands first at constant pressure and then at constant temperature to a volume V 1 . In which of these two cases will the gas do more work?
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Sol. For all volumes from V 0 to V 1 the gas pressure in the constant-pressure process will be larger
than in the constant-temperature one (Fig.). Accordingly, the work done by the gas will also be larger in the constant-temperature process.

During expansion at constant pressure.
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