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Mole Fraction of Water Vapor in Moist Air

Mole fraction of water vapor is the ratio of water molecules - to air and water molecules

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The mole fraction of water vapor is the ratio of the number of mole of water vapor in the moist air - to the total number of mole of dry air and water vapor.

The mole fraction of water vapor in moist air can be expressed as

xw = nw / (na + nw)                                            (1)


xw = mole fraction of water vapor

nw = mole of water

na = mole of air

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  • en: mole fraction moist air
  • es: aire húmedo fracción molar
  • de: Molenbruch feuchte Luft
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