Okay maybe this isn’t quite the best place for this. I’m a third year Chemistry student in university. I have a physical chemistry course, and I had this homework question that we both didn’t do in class and I can’t figure out if it’s done correctly.
There is a 400m^3 room at 27 C. The relative humidity is 60%. Find the mass of water in the room.
I know that 60% humidity means that the air contains 60% of the maximum water content the air would have if it was saturated (in equilibrium with liquid water) at that defined temperature. Thing is I have no idea how to find the partial pressure of water vapour if the air is saturated. Otherwise the question would be quite simple.
What I did, was I used this book of steam tables (which hasn’t been mentioned in class yet), looked at 27°C, and there’s a “saturation volume” of 38.774 m^3/kg. I used that to get a mass of water of 6.19kg in the room.
Is that right/okay to do? Is there some formula I’m missing that will give me partial pressure of water vapour at saturation?