A bucket full of water is placed in a room at 150 C with initial relative humidity 40 %. The volume of the room is 50 m3. (a) How much water will evaporate ? (b) If the room temperature is increased by 50 C, how much more water will evaporate ? The saturation vapour pressure of water at 150 C and 200 C are 1.6 kPa and 2.4 kPa respectively.
The condition of air in a closed room is described as follows. Temperature = 250 C, relative humidity = 60 %, pressure = 104 kPa. If all the water vapour is removed from the room without changing the temperature, what will be the new pressure ? The saturation vapour pressure at 250 C = 3.2 kPa.