Phase Transition Enthalpy Measurements of Organic Compounds. An Update of Sublimation, Vaporization, and Fusion Enthalpies from 2016 to 2021
William E. Acree, James S. Chickos
Abstract
The compendium of phase change enthalpies published in two parts in 2016 is updated to include new fusion, vaporization, and sublimation enthalpies published in the interim and includes some earlier data either previously missed or were unavailable. Also included in this article is an update of recent studies on the phase change enthalpies of polyaromatic hydrocarbons. Group values previously evaluated to adjust for temperature of phase changes are updated for aromatic compounds in view of recent experimental data. The new group parameters have been evaluated on the basis of their consistency in providing appropriate temperature adjustments to phase change enthalpies at T = 298 K as evaluated by a thermochemical cycle. This evaluation provides transition temperatures and about 1000 heats of fusion, 700 heats of vaporization, 500 heats of sublimation, and about 50 other heats of transitions for about 30 polyaromatic hydrocarbons and 1100 other molecules consisting of C1-C57 organic compunds, organometallics, inorganic compounds, and ionic liquids taken from about 900 references.