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Enthalpies of solution and crystallization of fumaric acid in aqueous solution

✍ Scribed by A. Dallos; É. Hajós-Szikszay; A. Horváth; J. Liszi; J. Barczyńska; A. Bald

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

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✦ Synopsis

Enthalpies of solution for (fumaric acid + water) have been measured at the temperatures (298.15, 313.15, and 333.15) K over the composition range of homogeneous solutions by using a SETARAM C80 D mixing calorimeter. The concentration and temperature dependence of the molar enthalpies of solutions and excess molar enthalpies are given by a Redlich-Kister equation fitted to the experimental data. The standard enthalpy of solution was determined by considering the effect of incomplete dissociation of C 4 H 4 O 4 on the solution data. Enthalpies of crystallization of fumaric acid in aqueous solutions have been measured at the temperatures (298.15, 303.15, 308.15, and 313.15) K during unseeded programmed crystallization. The molar enthalpies of crystallization data are thermodynamically consistent with those calculated from partial molar enthalpies of solution.

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