Excess Molar Enthalpies of Binary Mixtures Containing Glycols or Polyglycols + Dimethyl Sulfoxide at 308.15 K

Excess molar enthalpies, , were determined as a function of molar fraction at 308.15 K and at atmospheric pressure for the binary mixtures containing dimethyl sulfoxide with ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, poly(ethylene glycol)-200, pol...

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Bibliographic Details
Published in:Journal of chemical and engineering data 2003-07, Vol.48 (4), p.995-998
Main Authors: Comelli, Fabio, Ottani, Stefano, Francesconi, Romolo, Castellari, Carlo
Format: Article
Language:English
Subjects:
Chemical thermodynamics
Chemistry
Exact sciences and technology
General and physical chemistry
Mixtures
Thermodynamic properties
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Summary:Excess molar enthalpies, , were determined as a function of molar fraction at 308.15 K and at atmospheric pressure for the binary mixtures containing dimethyl sulfoxide with ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, poly(ethylene glycol)-200, poly(ethylene glycol)-300, poly(ethylene glycol)-400, and poly(ethylene glycol)-600. All curves are negative over the entire composition range with minima ranging from −430 J·mol-1 (propylene glycol) up to −1080 J·mol-1 (poly(ethylene glycol)-600). The results were correlated using the Redlich−Kister polynomial, and the adjustable parameters were obtained by the least-squares method. The dependence of on mixture composition is qualitatively discussed in terms of molecular interactions.
ISSN:0021-9568
1520-5134
DOI:10.1021/je034007i