Question: A cylinder fitted with a frictionless piston contains R-134a at 10oC, quality of 50%, and initial volume of 100 L. The external force on the

A cylinder fitted with a frictionless piston contains R-134a at 10oC, quality of 50%, and initial volume of 100 L. The external force on the piston now varies in such a manner that the piston moves, increasing the volume. It is noted that the temperature is 25oC when the last drop of liquid R-134a evaporates. The process continues to a final state of 40oC, 600 kPa. Assume the pressure is piecewise linear in volume and determine the final volume in the cylinder and the work and heat transfer for the overall process.
a) The final volume in the cylinder.
b) The work and heat transfer for the overall process.

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