Important to engineers and meteorologists alike, the field of psychrometrics explores the thermodynamic properties of gas-liquid mixtures, including air and water vapor. The particular concentration of water vapor in air is a psychrometric property known as 'absolute humidity'.
I know there is this question already How do I convert Relative Humidity into specific humidity. But I don't have ρws = density of water vapor (kg/m3) and ρ = density of the moist or humid air (kg/m3). Is there another way to calculate it? Also I have air pressure but it's in the range of 0.
Measurement system, absolute humidity is typically measured in 'grains of moisture' per cubic foot of air. To calculate this figure, you need four pieces of data: atmospheric pressure, air temperature, dry bulb temperature, and wet bulb temperature.