If we know the relative humidity of the moist air and the water vapor density and the density of the air, the specific humidity can be expressed as:
x = 0.622 φ ρws / (ρ - ρws) 100% (1)
x = specific humidity (humidity ratio) of air vapor mixture (kgh2o/kgdry_air)
φ = relative humidity (%)
ρws = density of water vapor (kg/m3)
ρ = density of the moist or humid air (kg/m3)
Moist and humid air - psychrometric charts, Mollier diagrams, air-condition temperatures and absolute and relative humidity and moisture content.
Absolute humidity is the actual mass of water vapor present in the air water vapor mixture.
The mass of water vapor present in moist air - to the mass of dry air.
Pressure, temperature and volume in a perfect ideal gas like moist air (air with water vapor).
The change in state wwhen mixing moist air - enthalpy, heat, temperature and specific humidity.
Density of the mix of dry air and water vapor - moist humid air.
Sensible and latent heat of moist air.
Psychrometric table with humid air properties like saturation pressure, specific volume, enthalpy and entropy.
Relative humidity in moist air is the ratio of partial vapor pressure to air pressure.
Specific volume of moist air is defined as the total volume of humid air per mass unit of dry air
Recommended relative humidity level.