New corresponding states model for the estimation of the vaporization enthalpy of fluids

In this work, we use the corresponding states principle based on the use of two reference fluids to propose a new predictive model for the vaporization enthalpy of fluids. The main differences with respect to previous models are in the choice of the reference fluids and in the use of the analytical expression proposed in the Design Institute for Physical Property Data (DIPPR) database to give the vaporization enthalpy of those reference fluids. We show that the overall mean absolute percentage deviation with respect to 47 930 data from DIPPR can be reduced to 2.8%. We also study the behaviour of this and other similar models in the low, intermediate, and high temperature ranges, as well as its accuracy for 81 families of fluids. Finally, we explain why better accuracy cannot be obtained by using the acentric factor as the only interpolative property.