Development of Abraham model expressions for predicting the standard molar enthalpies of vaporization of organic compounds at 298.15 K

Abstract

Published experimental standard molar enthalpies of vaporization data at 298.15 K have been compiled from the chemical and engineering literature for 703 liquid organic and organometallic compounds. The compiled experimental data are used to develop predictive expressions based on the Abraham model. The derived correlations provide reasonably accurate mathematical descriptions of the observed molar enthalpies of vaporization. Standard deviations between the experimental and back-calculated molar enthalpies of vaporization are on the order of 2.2 kJ mol−1, which is comparable to (if not better than) many of the existing predictive methods. The derived mathematical expressions can be used to estimate molar enthalpies of vaporization of additional compounds at 298.15 K, provided that the Abraham model compound descriptors are known.