Density of an Ideal Gas

Density of an ideal gas (volumetric mass density) is greatly affected by pressure.

 

Density of an Ideal Gas formula

\(\large{ \rho = \frac {M \; p_{atm} }{R \; T_a} }\)

Where:

Units	English	Metric
\(\large{ \rho }\)   (Greek symbol rho) = density of an ideal gas	\(\large{\frac{lbm}{ft^3}}\)	\(\large{\frac{kg}{m^3}}\)
\(\large{ T_a }\) = absolute temperature	\(\large{R}\)	\(\large{K}\)
\(\large{ p_{atm} }\) = atmospheric pressure	\(\large{\frac{lbf}{in^2}}\)	\(\large{Pa}\)
\(\large{ M }\) = molar gas	\(\large{ft^3}\)	\(\large{m^3}\)
\(\large{ R }\) = molar gas constant	\(\large{\frac{lbf-ft}{lbmol-R}}\)	\(\large{\frac{J}{kmol-K}}\)