An apartment has the dimensions 8m by 5m by 3m. Thetemperature is 25 degrees C,

Question

An apartment has the dimensions 8m by 5m by 3m. Thetemperature is 25 degrees C, and the relative humidity is60%.
a). How much water vapor does each cubic meter of aircontain? b). What is the total mass of water vapor in the air in theapartment? Worth 14 thank you An apartment has the dimensions 8m by 5m by 3m. Thetemperature is 25 degrees C, and the relative humidity is60%.
a). How much water vapor does each cubic meter of aircontain? b). What is the total mass of water vapor in the air in theapartment? Worth 14 thank you

Explanation / Answer

The relative humidity HR = Pw / Ps    therefore the amount ofwater vapor does each cubic meter contain       Pw = HR*Ps =0.6*29.6*105 Pa =17.76*105 Pa
(b) The total mass M is given by   the humidity ratio = Pw/Ps-Pw =0.623(17.76*105 Pa)/(29.6-17.76)*105 Pa= 0.935    and we know that M = 0.935*1.2041 =1.125kg the total mass = 135kg

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