Non-Ideal Gases: How do you relate P, V, T?. Non-ideal if:. Step 1 : Is the gas ideal or non-ideal? (Page 192). If ideal, use PV = nRT. Step 2 : Non-ideal? Choose an approach Equation of State Compressibility Factor. Equations of State give analytic solutions
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Non-Ideal Gases: How do you relate P, V, T?
Step 1: Is the gas ideal or non-ideal? (Page 192)
If ideal, use PV = nRT
PV = znRT
Notes: 1. Non-ideal gases use “reduced” values for P, T, V so that “universal” equations and plots can be used. Otherwise, every gas (e.g., nitrogen, propane, etc) would have different plots and equations relating P, T, V.
2. is the molar volume = volume divided by the moles (vol/mol)
3. Kay’s Rule: If you have more than one component, the “pseudocritical” T and P are “weighted” by their mole fractions (pg. 211)