# Beattie-Bridgeman Real Gas Model

1. Aug 3, 2007

### Chris P

I need to calculate the compressability of several gases as they are being added to a storage cylinder. I would like to use the Beattie-Bridgeman equation as described here.

I need to be able to compute the Z factor (compressability) for a given gas at a given pressure.

I am a bit new to this and need some help to work my way through this.

So here is where I am at (far behind from what I can tell)

P = pressure (this is what we are solving?)

R = molar gas constant (I assume you look this up somewhere)

T = temperature (From what I have read this is in K)

V = volume of a mole of gas (The what?)

A, B and c = empirical constants (I assume these are dirrerent for different gases. Is there a table somewhere?)

I am dealing with O2, HE and Air (assuming .21 FO2 and .79 FN)

Ususally I can figure out complex things like this is I get a shove in the right direction. Thanks

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2. Aug 8, 2007

### Chris P

Got the constants and figured out everything.

3. Feb 8, 2008

### Wolfgang M

Hi!

I am looking for the same stuff, can you help me on this?

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