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Q: A flow of 2 kg/s completely dry air at T1, 100 kPa is cooled down to 10?C by spraying liquid water at 10°C, 100 kPa into it so it becomes saturated moist air at 10°C. The process is SSSF with no external heat transfer or work. Find the exit moist air humidity ratio and the flow rate of liquid water. Find also the dry air inlet temperature T1.