A piston-cylinder device contains 5 kg of refrigerant-134a at 0.7 MPa and 60Â°C. The refrigerant is now cooled at constant pressure until it exists as a liquid at 24Â°C. If the surroundings are at 100 kPa and 24Â°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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