Can you convert air pressure 400 mmH2O to air volume (cubics metre) or mass (kg)?

Answer 1

The quantities you have listed are in fact related via the ideal gas law. So, assuming you aren't in huge temperature or pressure extremes, you can use the ideal gas law with decent results.

Ideal Gas Law
PV = nRT

where P = pressure (N/m^2)
V = volume (m^3)
n = number of moles of gas
R = universal gas constant = 8.3145 J/(mol*K)
T = temp (in Kelvins)

So, by looking at the equation you can not convert air pressure directly to volume without also knowing the temperature and number of moles of gas.

Answer 2

i'm pretty sure that the volume of any gas is determined by the pressure being exerted on it, it doesn't have a set volume or it would be a liquid or a solid. As far as mass goes, you would need to know the precise mixture of gases in your air sample. (e.g. the mix of oxygen, nitrogen, etc..) then you could use the periodic table to assist you in determining the mass of your sample. I know its not a perfect answer, but I hope it helps.

Answer 3

one's a pressure, one's a volume, and one's a mass, so the short answer is no. But P x A = F, so if you had an area you could get a force in say pounds and convert it to kg.

Answer 4

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