# Gas density¶

The density of a gas can be calculated using its molecular weight, pressure, and temperature as shown below:

$\rho_{gas} = \frac{P \cdot MW}{R \cdot T}$

## Nomenclature¶

$$\rho_{gas}$$ - Density of gas (kg/m³)
$$P$$ - Pressure of the gas (Pa)
$$MW$$ - Molecular weight of the gas (g/mol)
$$R$$ - Gas constant as 8.3145 [(m³ Pa)/(K mol)]
$$T$$ - Temperature of the gas (K)

## Source code¶

chemics.gas_density.rhog(mw, p, tk)[source]

Calculate gas density from molecular weight, pressure, and temperature.

Parameters
• mw (float) – Molecular weight of gas [g/mol]

• p (float) – Pressure of the gas [Pa]

• tk (float) – Temperature of the gas [K]

Returns

rho (float) – Density of gas [kg/m^3]

Examples

>>> rhog(28, 101325, 773)
0.4414