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Thermochemistry of Precipitation of Alkaline Earth Laurates

Vesna Hrust ; Laboratory of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, 41001 Zagreb, P. O. Box 163, Croatia, Yugoslavia
Đurđica Težak ; Laboratory of Physical Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, 41001 Zagreb, P. O. Box 163, Croatia, Yugoslavia

Puni tekst: engleski, pdf (11 MB) str. 129-138 preuzimanja: 211* citiraj
APA 6th Edition
Hrust, V. i Težak, Đ. (1991). Thermochemistry of Precipitation of Alkaline Earth Laurates. Croatica Chemica Acta, 64 (2), 129-138. Preuzeto s https://hrcak.srce.hr/137300
MLA 8th Edition
Hrust, Vesna i Đurđica Težak. "Thermochemistry of Precipitation of Alkaline Earth Laurates." Croatica Chemica Acta, vol. 64, br. 2, 1991, str. 129-138. https://hrcak.srce.hr/137300. Citirano 23.09.2020.
Chicago 17th Edition
Hrust, Vesna i Đurđica Težak. "Thermochemistry of Precipitation of Alkaline Earth Laurates." Croatica Chemica Acta 64, br. 2 (1991): 129-138. https://hrcak.srce.hr/137300
Harvard
Hrust, V., i Težak, Đ. (1991). 'Thermochemistry of Precipitation of Alkaline Earth Laurates', Croatica Chemica Acta, 64(2), str. 129-138. Preuzeto s: https://hrcak.srce.hr/137300 (Datum pristupa: 23.09.2020.)
Vancouver
Hrust V, Težak Đ. Thermochemistry of Precipitation of Alkaline Earth Laurates. Croatica Chemica Acta [Internet]. 1991 [pristupljeno 23.09.2020.];64(2):129-138. Dostupno na: https://hrcak.srce.hr/137300
IEEE
V. Hrust i Đ. Težak, "Thermochemistry of Precipitation of Alkaline Earth Laurates", Croatica Chemica Acta, vol.64, br. 2, str. 129-138, 1991. [Online]. Dostupno na: https://hrcak.srce.hr/137300. [Citirano: 23.09.2020.]

Sažetak
The solubility of alkaline earth laurates was studied in aqueous solutions as a function of temperature. Dissolution enthalpies AdH°, determined directly by calorimetry, were compared with the solubility data. The enthalpy change AdfiT0 showed linear dependence on temperature. The heat capacity change AdCp, calculated from AdH°vs. T plot, was found to be 1.1 kJ mol"1 K"1 for all salts.
The entropy change of dissolution AdS°, as obtained from solubility and calorimetiy, showed linear dependence on In T; AdCp, calculated from these plots, was the same as obtained from temperature dependence of the enthalpy.
Specific behaviour of each alkaline earth cation is characterized by the entropy change A<*S°, which is the lowest for calcium salt, thus explaining the irregular low solubility of calcium carboxylates. The so called compensation effect was explained in terms of the »critical compensation temperature®, which was found to be just an average temperature within the examined temperature region.

Hrčak ID: 137300

URI
https://hrcak.srce.hr/137300

Posjeta: 301 *