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Excess molar volumes and enthalpies of (1-hexyne, or 1-heptyne, or 1-octyne  +  sulfolane) at the temperature 303.15 K

✍ Scribed by T.M. Letcher; W.C. Moollan; J.A. Nevines; U. Domańska

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
108 KB
Volume
32
Category
Article
ISSN
0021-9614

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✦ Synopsis

Excess molar volumes V E m and excess molar enthalpies H E m were measured as a function of mole fraction at T = 303.15 K and atmospheric pressure for each of the mixtures {1-heptyne, or 1-octyne + tetramethylene sulfone (sulfolane)}. Excess molar volumes were also measured for mixtures of (1-hexyne + sulfolane). The results were compared in an attempt to investigate the interactions between the highly polar sulfolane molecule and the terminal proton of the alkynes.

The H E m results were discussed in terms of the NRTL and Wilson models and were predicted from equimolar values of V E m by the Prigogine-Flory-Patterson (PFP) theory with a free volume contribution obtained from Flory's equation of state model. The results were compared with the modified UNIFAC model. The description of H E m by the PFP theory was better than the prediction by the modified UNIFAC.

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