An uninsulated cylinder fitted with a piston contains air at 500 kPa, 200C, at which point the

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An uninsulated cylinder fitted with a piston contains air at 500 kPa, 200C, at which point the volume is 10 L. The external force on the piston is now varied in such a manner that the air expands to 150 kPa, 25 L volume. It is claimed that in this process the air produces 70% of the work that would have resulted from a reversible, adiabatic expansion from the same initial pressure and temperature to the same final pressure. Room temperature is 20C.
a) What is the amount of work claimed?
b) Is this claim possible?
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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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