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A piston–cylinder assembly contains ammonia, initially at a temperature of -20°C and a quality of 40%....

A piston–cylinder assembly contains ammonia, initially at a temperature of -20°C and a quality of 40%. The ammonia is slowly heated to a final state where the pressure is 6 bar and the temperature is 100°C. While the ammonia is heated, its pressure varies linearly with specific volume. For the ammonia, determine the work and heat transfer, each in kJ/kg.

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Answer #1

From Ammonia propeltiy At -20°c Peat= 1.909 bar V = 0.0015038 m3/kg Ug = 0.6233 my kg Upg = 1210.9 kJ/kg 4- 88.00 kJ/kg V, -0

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