Cubic equations of state are the simplest way to represent vapor and liquid behavior. There are...

 

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Cubic equations of state are the simplest way to represent vapor and liquid behavior. There are several things that cubic equations of state account for that the ideal gas law does not: (1) (2) (3) The Virial equation of state is given by: The Lee Kessler correlation comes from the Theorem of Corresponding States: "All fluids, when compared at the same reduced temperature and pressure have the same compressibility factor (Z), and all deviate from ideal gas behavior to the same degree." The Lee Kessler correlations are useful for nonpolar gases and are given by: For an ideal gas, the compressibility factor (Z) = 1. Cubic equations of state are the simplest way to represent vapor and liquid behavior. There are several things that cubic equations of state account for that the ideal gas law does not: (1) (2) (3) The Virial equation of state is given by: The Lee Kessler correlation comes from the Theorem of Corresponding States: "All fluids, when compared at the same reduced temperature and pressure have the same compressibility factor (Z), and all deviate from ideal gas behavior to the same degree." The Lee Kessler correlations are useful for nonpolar gases and are given by: For an ideal gas, the compressibility factor (Z) = 1.