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Q5. A vapour compression cycle operates using R717. The refrigerant enters the compressor at 1.196 bar as dry saturated vapour. The refrigerant is isentropically compressed to 8.57 bar. The temperature at the outlet of the condenser is undercooled by 18 K.

(a) Calculate the enthalpy and temperature at the exit of the compressor. (6)

(b) Calculate the entropy at the entrance to the evaporator. (6)

(c) Draw the P-h and T-s graphs to represent the system. (4)