12.48 A large room contains moist air at 308C, 102 kPa. The partial pressure of water vapor is 1.5 kPa. Determine
(a) the relative humidity.
(b) the humidity ratio, in kg(vapor) per kg(dry air).
(c) the dew point temperature, in 8C.
(d) the mass of dry air, in kg, if the mass of water vapor is 10 kg.