Conversion between mole fractions and volume fractions in gas analysis
Conversion between mole fractions and volume fractions in gas analysis
(OP)
When can you assume that volume percent is the same as mole percent?
I've read in another posting that you can assume this at low pressure but I'd like to know why and under what conditions.
Note: I have already submitted this thread under a different subject and had various replies. thread798-213695: Concentration conversion
I've read in another posting that you can assume this at low pressure but I'd like to know why and under what conditions.
Note: I have already submitted this thread under a different subject and had various replies. thread798-213695: Concentration conversion





RE: Conversion between mole fractions and volume fractions in gas analysis
For real gases the relationship is PV = nZRT where Z is the compressibility of the gas. Z varies with temperature and pressure, but for "low" pressures and "high" temperatures Z is close to 1.0, and the ideal gas equation basically applies. You need to find out what Z is for your gases under your conditions.
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RE: Conversion between mole fractions and volume fractions in gas analysis
RE: Conversion between mole fractions and volume fractions in gas analysis