A compendium of phase change enthalpies published in 2010 is updated to include the period 1880–2015. Phase change enthalpies including fusion, vaporization, and sublimation enthalpies are included for organic, organometallic, and a few inorganic compounds. Part 1 of this compendium includes organic compounds from C1 to C10. Part 2 of this compendium, to be published separately, will include organic and organometallic compounds from C11 to C192. Sufficient data are presently available to permit thermodynamic cycles to be constructed as an independent means of evaluating the reliability of the data. Temperature adjustments of phase change enthalpies from the temperature of measurement to the standard reference temperature, T = 298.15 K, and a protocol for doing so are briefly discussed.

Phase Transition Enthalpy Measurements of Organic and Organometallic Compounds. Sublimation, Vaporization and Fusion Enthalpies From 1880 to 2015. Part 1. C1-C10

This paper reports high-pressure phase equilibrium data on binary mixtures of carbon dioxide with dimethyl sulfoxide (DMSO) and ternary mixtures of DMSO, carbon dioxide and water. The data cover a range of temperatures between 280 and 370 K and pressures up to 15 MPa. Partial liquid miscibility was observed in the binary system DMSO + CO 2 at high CO 2 concentrations. Vapor–liquid, liquid–liquid and vapor–liquid–liquid equilibrium conditions were measured. The experimental data were modeled with a group-contribution equation of state that takes into account association effects (GCA-EOS). Self-association of water and cross-association between water and DMSO molecules were considered. A molecular group (CH 3 SOCH 3 ) was used to represent DMSO, the first member of the alkyl-sulfoxide family. Pure group and binary interaction parameters for this new molecular group have been determined. Good correlation and prediction of phase equilibrium conditions were obtained.

Phase equilibria of dimethyl sulfoxide (DMSO) + carbon dioxide, and DMSO + carbon dioxide + water mixtures

Isothermal vapor−liquid equilibria were measured for the ternary system water + 2-aminoethanol + dimethyl sulfoxide and its three constituent binary mixtures at 363.15 K. The apparatus used was a modified Rogalski−Malanoski equilibrium still. The experimental binary data were correlated by the NRTL equation. The ternary system was predicted using the binary NRTL parameters with good accuracy.

Isothermal vapor-liquid equilibria for water + 2-aminoethanol + dimethyl sulfoxide and its constituent three binary systems

The total vapor pressures of dimethyl sulfoxide (DMSO) and water mixtures have been measured at 15, 20, 25 and 30°C. The activity coefficients and molar excess Gibbs energies of the system have been calculated. Possible association interaction in the system are discussed.

Vapor pressure of dimethyl sulfoxide and water binary system

Recommended vapor pressures for thiophene, sulfolane, and dimethyl sulfoxide

The vapor pressures of pure DMSO were measured from 30 to 150°C by ths isoteniscopic method. An empirical equation for P-T correlation is given and molal heats of vaporization are calculated. The vapor-liquid equilibrium compositions and temperatures were determined experimentally under isobaric conditions of 550, 350, and 150 mmHg pressures for DMSO-H2O system. The activity coefficients are correlated to liquid compositions by Chao and Hougen''s equation.

https://www.jstage.jst.go.jp/article/jcej1968/5/3/5_3_223/_pdf

Mutsuo Nakayama

Papers

Vapor pressure of pure dmso and vapor-liquid equilibria in dmso-h2o system under isobaric conditions