How fast does water vapor rise?

If the vapor pressure is less than 0.8, the water would not evaporate at all, and in fact in that atmosphere, water would condense. Irving Langmuir developed a way to measure vapor pressure by measuring the evaporation rate, which we will now flip around backwards. read more

Water vapor is a gas made of one oxygen atom and two hydrogen atoms. The surrounding air is a gas mixture consisting mostly of nitrogen (two nitrogen atoms). Water vapor is lighter than air and therefore will rise until it has time to mix with the surrounding air. read more