8-30 A piston-cylinder device contains 5 kg of refrigerant134a at 0.7 MPa and 60°C. The refrigerant is now cooled at constant pressure until it exists as a liquid at 24°C. If the surroundings are at 100 kPa and 24°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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