A piston/cylinder contains ethane gas, initially at 500 kPa, 100 L, and at ambient temperature, 0C. The

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A piston/cylinder contains ethane gas, initially at 500 kPa, 100 L, and at ambient temperature, 0°C. The piston is now moved, compressing the ethane until it is at 20°C, with a quality of 50%. The work required is 25% more than would have been required for a reversible polytrophic process between the same initial and final states. Calculate the heat transfer and the net entropy change for the process.
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Fundamentals of Thermodynamics

ISBN: 978-0471152323

6th edition

Authors: Richard E. Sonntag, Claus Borgnakke, Gordon J. Van Wylen

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