On the definition of the components’ difference in properties in the unified extrapolation model

摘要: Abstract As an important method to link the thermodynamic properties of a binary system that multicomponent system, many extrapolation models have been proposed in past. However, lacking clear rules distinguish applicable systems these led much confusion during choosing concrete model. Recently, unified model has by introducing contribution coefficient, which is correlated difference between third component and from selected sub-binary system. In this paper, two ways treat were discussed their performances tested predicting integral enthalpy mixing systems. The results showed when confined considered components, predicted values are perfect agreement with experimental data both symmetric asymmetric systems; defined considering interaction components other one obtained good only reason latter consideration, treatment may exaggerate components.