GAS-VAPOR MIXTURES Problem 1: A tank contains 21 kg of dry air and 0.3 kg of water vapor at 20°C and 100 kPa total pressure. Determine (a) the specific humidity, (b) the relative humidity, and (c) the volume of the tank. Problem 2: Determine the masses of dry air and the water vapor contained in a 240-m³ room at 98 kPa, 23°C, and 50 percent relative humidity. Problem 3: Humid air at 100 kPa, 20°C, and 90 percent relative humidity is compressed in a steady-flow, isentropic compressor to 800 kPa. What is the relative humidity of the air at the compressor outlet? 800 kPa Humid air 100 kPa 20°C, 90%