A sample of air has a temperature of 20C, a relative humidity of 80%, and a pres
ID: 159858 • Letter: A
Question
A sample of air has a temperature of 20C, a relative humidity of 80%, and a pressure of 900 hPa.
a) Find its vapor pressure e
b) Find its dewpoint Td
c) Find its mixing ratio w
d) Find the saturation mixing ratio ws
e) If 1m^3 of the air is compressed isothermally to a volume of only 0.2 m^3, find the mass of water that must condense out in order to eliminate any supersaturation. Hint: Determine the mass M1 of vapor in the original volume and compare it with the mass M2 of vapor at saturation after compression. Answer: 10.5g
Explanation / Answer
A sample of air has a temperature of 20C, a relative humidity of 80%, and a pres