Density = P/(RT) (kg/m3)
P= Pressure (Pa)
R= Individual gas constant (J/kg.K) = Ru/MW
T= absolute temperature (K)
Ru= Universal gas constant (8314.472 J/kmol.K)
MW= Gas Molecular weight
Example:
Air molecular weight = 29 kg/kmol
Pressure = 1 bara = 100,000 Pa
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