8 34 a piston cylinder device contains 8 kg of refrigerant 134a at 0 7
8-34 A piston-cylinder device contains 8 kg of refrigerant-
134a at 0:7 MPa and 60°C. The refrigerant is now cooled at
constant pressure until it exists as a liquid at 20°C. If the sur-
roundings are at 100 kPa and 20°C, determine (a) the exergy
of the refrigerant at the initial and the final states and (b) the
exergy destroyed during this process.
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