Using the ideal gas law, we can calculate the density of the gas. The details of input required and calculation is given with an example.
Gas Molecular weight = MWair
Gas Temperature = T (degree Centigrade)
Gauze pressure of the Gas = P (KN/m3)
Ideal gas law constant = R (8.3145 Kn-m/kg mole oK)
![](https://i0.wp.com/vdchari.com/wp-content/uploads/2022/10/gas-density.png?resize=850%2C564&ssl=1)
The calculations are done to find out absolute gas pressure
Absolute gas pressure =
![](https://i0.wp.com/vdchari.com/wp-content/uploads/2022/10/image-49.png?resize=198%2C48&ssl=1)
Gas temperature in kelvin
![](https://i0.wp.com/vdchari.com/wp-content/uploads/2022/10/image-50.png?resize=174%2C43&ssl=1)
Gas density D (kg/m3) =
![](https://i0.wp.com/vdchari.com/wp-content/uploads/2022/10/image-51.png?resize=171%2C69&ssl=1)
Example:
MWair = 29
T = 30oC
P = 1 KN/m3
R = 8.3145 Kn-m/kg mole oK
The calculations are done to find out
![](https://i0.wp.com/vdchari.com/wp-content/uploads/2022/10/image-52.png?resize=407%2C61&ssl=1)
![](https://i0.wp.com/vdchari.com/wp-content/uploads/2022/10/image-53.png?resize=596%2C132&ssl=1)