Q. On a summer day, the air conditioning breaks down and the air in your classroom becomes very warm and muggy with a vapour pressure of 20 hPa and a temperature of 25o C.
a) if the volume of the classroom is 40 m3, how much water is present in the room in vapour form? State the answer both as a mass in kg and a liquid-equivalent volume in liters, assuming that the density of liquid water is 1000 kg/m3.
b) If the pressure in the room is 900 hPa, what is the virtual temperature of air? State your answer both in K and degrees C.