The thermodynamic properties of dibenzothiophene

Thermodynamic properties of pyridine—I. Vapor pressures, high-temperature heat capacities, densities, critical properties, derived thermodynamic functions, vibrational assignment, and derivation of recommended values

“…(5) The results here demonstrate the value of extending this comparison over as broad a temperature range as possible. Also, the high precision of the newly reported vapor pressures allows the calculation of the standard molar entropies from calorimetric results with very small uncertainties.…”

“…Purification of the water and decane used as reference materials in the ebulliometric vapor-pressure studies has been described. (5) Molar values are reported in terms of M=79.1014 g·mol −1 based on the relative atomic masses of 1981 (8) and the gas constant, R=8.31451 J·K −1 ·mol −1 , adopted by CODATA. (9) The platinum resistance thermometers used in the measurements were calibrated by comparison with a standard thermometer whose constants were determined at the National Institute of Standards and Technology (NIST).…”

Possible precursors and products of deep hydrodesulfurization of gasoline and distillate fuels III. The thermodynamic properties of 1,2,3,4-tetrahydrodibenzothiophene

“…Sample decomposition above approximately T ¼ 600 K precluded heat-capacity measurements as well as experimental determination of the critical temperature and critical density. For other compounds, e.g., 2-aminobiphenyl [54] and dibenzothiophene [20], a rapid heating method was used for critical temperature and critical density determinations; however, this method failed in the present research. Critical properties were estimated with the measured densities and vapor pressures as described here.…”

“…Recent publications by the Bartlesville Thermodynamics Group have detailed measurements leading to the standard thermodynamic properties of gaseous benzothiophene [19], dibenzothiophene [20], thianthrene and phenoxathiin [21], diphenylsulfide [22], and 2,3-dihydrobenzothiophene [18]. This paper includes details of the measurements leading to the determination of the standard thermodynamic properties for gaseous 1,2,3,4-tetrahydrodibenzothiophene.…”

High-energy components of “designer gasoline and designer diesel fuel” I. Heat capacities, enthalpy increments, vapor pressures, critical properties, and derived thermodynamic functions for bicyclopentyl between the T=(10 and 600) K

“…Slow decomposition of the sample above approximately T ¼ 600 K precluded reliable heat-capacity measurements in this region. However, sample decomposition was sufficiently slow to allow a rapid heating method [18,19] to be used to determine the temperature of conversion from the two-phase (liquid + gas) to the one-phase (fluid) region for a series of filling densities of the hermetically sealed d.s.c. cells.…”