Question: Refrigerant 1 3 4 a , initially at 1 MPa, 5 0 degreesC with a volume of 0 . 1 m ^ 3 , is

Refrigerant 134a, initially at 1 MPa, 50degreesC with a volume of 0.1m^3, is contained in an insulated piston-cylinder assembly. There refrigerant expands until the pressure is 100 kPa. It is claimed that the R-134a does 250 kJ of work against the piston during the process. Is this process possible

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