Benzene–water association Excess molar enthalpy and second virial cross-coefficients for (benzene–water)(g) and (cyclohexane–water)(g)

Benzene–polar fluid association. An analysis of measurements of the vapour phase excess molar enthalpy of mixtures of (cyclohexane, or benzene + polar and non-polar fluids)

“…These parameters give a good fit to the second virial coefficient of water over the temperature range (360 to 700) K. In (water + benzene) one must take account of the water-water association as well as the benzene-water association, and this could only be done because the potential parameters for water were determined previously. The measurements of H E m for (water + cyclohexane) (22) were in excellent agreement with the predicted values. The measurements for (water + benzene) (22) were considerably less than predicted, and the association model used to fit the measurements yielded K 12 (298.15 K) = 0.208 MPa −1 and H 12 = −11.3 kJ · mol −1 .…”

“…The measurements of H E m for (water + cyclohexane) (22) were in excellent agreement with the predicted values. The measurements for (water + benzene) (22) were considerably less than predicted, and the association model used to fit the measurements yielded K 12 (298.15 K) = 0.208 MPa −1 and H 12 = −11.3 kJ · mol −1 . This enthalpy of association is the specific part of the interaction energy.…”

“…The measurements include mixtures of steam with the hydrogen, argon, nitrogen, carbon monoxide, and carbon dioxide gases, the C 1 to C 8 n-alkanes, and cyclohexane and benzene. These last measurements revealed the unusual interaction with benzene, (22) and similar, though weaker, effects were seen in (steam + ethene), (52) and (steam + propene) (53) . Pair potential parameters for water appropriate to a water-nonpolar fluid interaction were obtained from an analysis of H E m measurements on 11 steam mixtures.…”

“…A single stage high pressure flow mixing calorimeter (12) was also used, and in this instrument the Joule-Thomson effect was negligible. The measurements were made on (cyclohexane, or benzene + nitrogen, (13) or methane, (10) or carbon dioxide, (14) or dimethyl ketone, (15) or diethyl ketone, (16) or ether, (17) or dioxane, (18) or chloromethane, (19) or dichloromethane, (20) or chloroform, (21) or tetrachloromethane, (20) or water, (22) or methanol, (23) or ethanol (24) ). For some of these fluids the available pure component second virial coefficients were either of poor quality, or in the case of dioxane non-existent.…”

Near infrared study of water-benzene mixtures at high temperatures and pressures

“…Such waterhydrocarbon mixtures are important in a wide range of industries including oil refineries, petrochemical industry, coal gasification and liquefaction, and a number of thermodynamical data have been reported so far. [8][9][10][11][12][13] These data are also useful for designing an environment-protecting technology where hydrothermal reactions are applied to destruction of toxic waste chemicals. 14 -18 In contrast to those extensive studies on the thermodynamic properties, molecular-level structures of the high-temperature mixtures had remained largely unknown until quite recently.…”