what is the vapor pressure of an air temperature of 20 degrees Celcius?

Answer 1

The equation of state for water vapor is given by:

e = d (R/m)T where e is the vapor pressure, d is the vapor density or absolute humidity, R is the gas constant, m is the molecular weight of water (18).

At T = 20C = 293 K , m = 18 gm/mole R= 8.314 x 10^7 ergs per degree K per mole

We are lacking the density of the water vapor, d, with which we could compute the vapor pressure, e.

Answer 2

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