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Excess enthalpies and excess volumes of binary mixtures of hydrofluoroether with alcohols

✍ Scribed by Takayo Takigawa; Takashi Minamihounoki; Katsutoshi Tamura

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
95 KB
Volume
34
Category
Article
ISSN
0021-9614

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✦ Synopsis

Excess enthalpies and excess volumes of {x nonaflluorobutylmethylether + (1-x) ethanol or methanol} were measured at T = 298.15 K. Excess enthalpies of both mixtures are positive and flatten in the middle mole fraction because of the concentration fluctuation approaching phase separation. Excess volumes were also large and flatten in the middle mole fraction. Partial molar enthalpies of ethanol or methanol are very large at infinite dilution in comparison with those of nonafluorobutylmethylether because of the breaking of hydrogen bonds of alcohol on mixing. The strong hydrogen bonds of methanol depresses the partial molar volume of methanol at infinite dilution.

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