![]() ![]() The SRK and PR equations belong to a family of so-called cubic equations of state. These equations include those of Bene dict-Webb-Rubin (BWR), Soave (SRK), who extended the remarkable Redlich-Kwong equation, and Peng-Robinson (PR). (13-3) have been restricted to mixtures of nonpolar compounds, namely, hydrocarbons and light gases. Until recently, equations of state that have been successfully applied to Eq. ![]() Consistent equations for enthalpy can similarly be derived. Where the mixture fugacity coefficients L for the liquid and ,V for the vapor are derived by classical thermodynamics from the PVT expression. When a single pressure-volume-temperature (PVT) equation of state is applicable to both vapor and liquid phases, the formulation used is ![]() Preferred analytical correlations are less empirical in nature and most often are theoretically based on one of two exact thermodynamic formulations, as derived in Sec. 13-14 K values (K = y/x) in light-hydrocarbon systems. ![]()
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