The thermodynamic properties of dibenzothiophene

Abstract

Measurements leading to the calculation of the ideal-gas thermodynamic properties for dibenzothiophene are reported. Thermochemical and thermophysical properties were determined by adiabatic heat-capacity calorimetry, differential-scanning calorimetry (d.s.c.), comparative ebulliometry, and inclined-piston manometry. A literature value for the energy of combustion was selected and combined with the results to calculate standard entropies, standard enthalpies, and standard Gibbs energies of formation for the ideal-gas at selected temperatures from 298.15 K to 800 K. The critical temperature and critical density were measured with the d.s.c., and a value for the critical pressure was derived. Sublimation pressures from 298.15 K to the triple-point temperature (371.8 K) were derived. All measured and derived properties were compared with literature values.