Problem
1. Ambient air at 100 kPa, 30oC, 40% relative humidity goes through a constant-pressure heat exchanger as a steady flow. In one case it is heated to 45oC, and in another case it is cooled until it reaches saturation. For both cases, find the exit relative humidity and the amount of heat transfer per kilogram of dry air.
2. A flow of moist air at 100 kPa, 35oC, 40% relative humidity is cooled by adiabatic evaporation of liquid 20oC water to reach a saturated state. Find the amount of water added per kg dry air and the exit temperature.
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.