1a. The relative humdity outdoor is 70% and the outdoortemperature is 90 degree F what is the actual partial pressure ofwater vapor in the air
1b. Humidty ratio (w) is the ratio of the mass of the water (Mw)to the mass of dry air (Mw) note that two partial pressures sum tothe total pressure (P =Pa + Pv) derive the equation
w = 0.622Pv / (P-Pv). Use the ideal gas equation for mass
1c. Solve for humidity ratio if the partial pressure of watervapor is 0.1816psia
1d. What is the relative humidity of 70 degree F moist air in aclassroom
1e. Estimate the mass (Ibm) of water vapor in the classroom
