- relative humidity (the ratio of the partial pressure of water to the saturated water pressure);
- specific humidity (the mass of water per mass of air); and
- absolute humidity (the mass of water per volume of air).
In particular, I wonder how I can answer the following question:
Outside, the temperature is T_o degrees, and the relative humidity is H_o percent. Inside my room, the temperature is T_i degrees, where T_i > T_o. When I open the room window to the outside, to what percentage will the inside relative humidity H_i tend, assuming I heat the room such that the inside temperature remains constant at T_i?
Can I expect that either the absolute or specific humidity inside and outside will tend to the same values? If yes, why? If not, is there another way to calculate what I want?