Generalized thermodynamic properties of real gases: Part II. Generalized Benedict‐Webb‐Rubin equation of state for real gases

By use of a least‐squares technique, a set of parameters for the generalized Benedict‐Webb‐Rubin equation is determined. The generalization of the equation is based on the modified theorem of corresponding states. The generalized equation shows a grand average absolute deviation of 1.6% in predicting the observed values of reduced pressure. The set of constants has been determined for densities up to twice the critical density in the reduced pressure range of 0 to 40.0 and a reduced temperature range of 1.0 to 15.0. The recommended generalized constants are A o ′ = 0.24180980, a o ′ = 0.04407059 a′ α′ = 0.11369478 × 10 −3 , B o ′ = 0.07643101, b′ = 0.03715171, C o ′ = 0.21217005, c′ = 0.06448001 and γ′ = 0.06.