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Humid air at 101 kPa, 25°C, 90% relative humidity is compressed in a steady-flow, isentropic compressor...

Humid air at 101 kPa, 25°C, 90% relative humidity is compressed in a steady-flow, isentropic compressor to 800 kPa.
(a) What is specific humidity of the air?
(b) What is the relative humidity of the air exiting the compressor?
(c) What is the change in enthalpy of the dry air during this process?
(d) What is the change in enthalpy of the water vapor, per unit dry air, during this process? Express your answer in kilojoules per kilogram of dry air.
Assume constant specific heats for both air and water vapor at room temperature, and that both behave as ideal gases.

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