Excess Enthalpies of Binary Mixtures of Methanol with Heptanone Isomers at 298.15 and 323.15 K

The excess molar enthalpies, , for methanol + 2-heptanone, 3-heptanone, and 4-heptanone have been measured as a function of mole fraction at 298.15 and 323.15 K by means of an isothermal flow calorimeter. Values for are endothermic with a maximum value occurring at a mole fraction close to 0.5. The...

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Published in:Journal of chemical and engineering data 1997-07, Vol.42 (4), p.735-737
Main Authors: Colino, Esther, Coto, Baudilio, Cabañas, Albertina, Pando, Concepción, Renuncio, Juan A. R
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Language:English
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Chemical thermodynamics
Chemistry
Exact sciences and technology
General and physical chemistry
Mixtures
Thermodynamic properties
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description The excess molar enthalpies, , for methanol + 2-heptanone, 3-heptanone, and 4-heptanone have been measured as a function of mole fraction at 298.15 and 323.15 K by means of an isothermal flow calorimeter. Values for are endothermic with a maximum value occurring at a mole fraction close to 0.5. The temperature effect on the excess enthalpy values is important. Maximum values at 298.15 K range from 725 to 744 J·mol-1. Maximum values at 323.15 K range from 908 to 955 J·mol-1. The position of the ketone group has little effect on the measured .
doi_str_mv 10.1021/je970032a
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subjects Chemical thermodynamics
Chemistry
Exact sciences and technology
General and physical chemistry
Mixtures
Thermodynamic properties
title Excess Enthalpies of Binary Mixtures of Methanol with Heptanone Isomers at 298.15 and 323.15 K
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