Superheated R-134a at 0.5 MPa, 20 C is cooled in a piston-cylinder at constant temperature to a final two-phase state with quality of 50%. The refrigerant mass is 5 kg, and during the process 500 kJ of heat is removed. Find the necessary work.

Superheated R-134a at 0.5 MPa, 20 C is cooled in a piston-cylinder at

1.	Superheated R-134a at 0.5 MPa, 20 C is cooled in a piston-cylinder at constant temperature to a final two-phase state with quality of 50%. The refrigerant mass is 5 kg, and during the process 500 kJ of heat is removed. Find the necessary work.
A.	-67.9 kJ
B.	-77.9 kJ
C.	-87.9 kJ
D.	-97.9 kJ
Answer» D. -97.9 kJ

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Superheated R-134a at 0.5 MPa, 20 C is cooled in a piston-cylinder at constant temperature to a final two-phase state with quality of 50%. The refrigerant mass is 5 kg, and during the process 500 kJ of heat is removed. Find the necessary work.

Superheated R-134a at 0.5 MPa, 20 C is cooled in a piston-cylinder at constant temperature to a final two-phase state with quality of 50%. The refrigerant mass is 5 kg, and during the process 500 kJ of heat is removed. Find the necessary work.

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