Abstract
Thermodynamic data including enthalpies of formation and fusion, entropies, and heat capacities have been derived for dibenzo-p-dioxin, dibenzofuran, and their polychlorinated derivatives in the solid and liquid states. The evaluated data are based on recent experimental determinations of enthalpies of formation of dibenzo-p-dioxin, 1-chlorodibenzo-p-dioxin, 2-chlorodibenzo-p-dioxin, and 2,3-dichlorodibenzo-p-dioxin, improved statistical thermodynamics calculations, several published vapor pressure measurements, melting temperatures, enthalpies of fusion, and various correlations. The consistent database is intended for simulation of the processes leading to the formation of these pollutants. This second part of our work describes evaluations for solid and liquid dibenzo-p-dioxin, dibenzofuran, and their polychlorinated derivatives together with vapor pressure data treatment to derive a consistent set of thermodynamic data.
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