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Real Gases (“ideal” liquid Capture (Molecules have finite mass and finite…

- - - - compressibility factors (reduced coordinates)
      - van der Waals
      - Tables (graphs) of measured data
- - - - Divide this by the actual density of the fluid.
        
        If you do not have the density of the liquid:
        most hydrocarbons have a density of about 700-1500 kg/m³
- - - - When Tr>2 OR Pr<0.2, you can assume ideal gas (one of the 2 is enough)
- - - - Look up compressibility factor (Z) in table D1
        
        When Z is between 0.95 and 1.05, you can assume small (no) deviations
        from ideal gas
- - - - Which variables do you have:
        
        P and V(ρ)
        
        Calculate Pr
        (Pr >0.2)
        Calculate V/Vl
        (V/Vl<25)
        find T using reduced v/d Waals
        
        T and V(ρ)
        
        Calculate Tr
        (Tr <2)
        Calculate V/Vl
        (V/Vl<25)
        find P using reduced v/d Waals
        
        P and T
        
        Calculate Pr
        and Tr, (Pr >0.2 and Tr<2)
        use compressibility chart (right scale!)
        PV=ZRT
    - - ideal gas
        PV=RT