Question: Air is compressed in a pistoncylinder device from 90 kPa and 20C to 400 kPa in a reversible isothermal process. Determine (a) The entropy change

Air is compressed in a piston–cylinder device from 90 kPa and 20°C to 400 kPa in a reversible isothermal process. Determine
(a) The entropy change of air and
(b) The work done.

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