Problem 1 Carbon dioxide gas enters a water-cooled compressor at conditions P, = 1 bar and T1 = 10 °C, and is discharged at conditions P2 = 36 bar and T2 = 90 °C. The entering CO2 flows through a 10 cm diameter pipe with an average velocity of 10 m-s1, and is discharged through a 3 cm diameter pipe. The power supplied to the compressor is 12.5 kJ · mol-1. What is the heat-transfer rate (Q) from the compressor? %3D Hi = 21.71 kJ mol-1 H2 = 23.78 kJ-mol-1 Vi = 23.40 L-mol-1 V2 = 0.7587 L-mol-1 %3D %3D

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