A classroom contains 6000. ft3 of air-water vapor mixture at 1.00 atm total pressure. The dry bulb temperature is 70.0°F and the wet bulb temperature is 65.0°F. Assuming a closed constant total pressure system, determine the following:
a. The relative humidity.
b. The partial pressure of the water vapor.
c. The dew point.
d. The amount of water that must be added to or removed from the air in the room to achieve 40.0% relative humidity at the same dry bulb temperature.