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Excess enthalpies and excess heat capacities of binary mixtures of (cyclohexanone, or 2-butanone, or 1,4-dioxane +  1,2-dimethoxyethane) and (1,4-dioxane  +  1,2-dimethoxyethane) atT =  298.15 K

✍ Scribed by Shipra Baluja; Takasuke Matsuo; Katsutoshi Tamura

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 165 KB
Volume: 33
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.2001.0873

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✦ Synopsis

Excess enthalpies and excess heat capacities of {x2-butanone + (1 -x)1,4-dioxane}, and {xcyclohexanone, or 2-butanone, or 1,4-dioxane + (1 -x)1,2-dimethoxyethane} were measured at T = 298.15 K. Excess enthalpies were negative for {x2-butanone + (1 -x)1,2-dimethoxyethane}, and negative with a small positive part in the region of x > 0.8 for {xcyclohexanone + (1 -x)1,2-dimethoxyethane}, whereas excess enthalpies of {x2-butanone + (1 -x)1,4-dioxane} were positive as for {xcyclohexanone + (1 -x)1,4-dioxane} previously reported. Excess enthalpies of {x1,4-dioxane + (1 -x)1,2-dimethoxyethane} were positive. The results were compared with the systems reported earlier. Excess heat capacities are positive for {x2-butanone + (1-x)1,2-dimethoxyethane} and {xcyclohexanone + (1 -x)1,2-dimethoxyethane}, and negative for {x2-butanone + (1 -x)1,4-dioxane} and {x1,4-dioxane + (1 -x)1,2-dimethoxyethane}. The last mixture shows a W-shaped curve of excess heat capacity.

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✦ Synopsis

Excess enthalpies and excess heat capacities of binary mixtures of (cyclohexanone, or 2-butanone, or 1,4-dioxane + 1,2-dimethoxyethane) and (1,4-dioxane + 1,2-dimethoxyethane) atT = 298.15 K