Question: A spring-loaded piston/cylinder arrangement contains R-134a at 20C, 24% quality with a volume 50 L. The setup is heated and thus expands, moving the piston.

A spring-loaded piston/cylinder arrangement contains R-134a at 20°C, 24% quality with a volume 50 L. The setup is heated and thus expands, moving the piston. It is noted that when the last drop of liquid disappears the temperature is 40°C. The heating is stopped when T = 130°C. Verify the final pressure is about 1200 kPa by iteration and find the work done in the process.

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