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Determine the entropy change of nitrogen during process

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Q: A piston-cylinder device contains 1.2 kg of nitrogen gas at 120 kPa and 27°C. The gas is now compressed slowly in a polytropic process during which PV1.3 = constant. The process ends when the volume is reduced by one-half. Determine the entropy change of nitrogen during this process.

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Mechanical Engineering: Determine the entropy change of nitrogen during process

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