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I am trying to find a formula which can calculate the volume that gas X will decrease by when pressure Y is added to it. Now I have already been pointed to the Ideal Gas Equation, however I read that this is best suited when looking at a single volume of a monatomic gas eg. Argon.

However I wish to experiment (play about) after doing my calculations and instead of messing about with a monatomic gas I would much rather use air so my question is...

Does anyone know a formula I can use to calculate the change in volume of a mixed gas (air) with varying pressure.

PS. I guess a list of pressure volume ratios for air which I could extrapolate from would also be usefull if anyone has them?...but I'd rather do the calculations myself.

Thanks

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# Un-ideal Gas Equation!

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