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Thermodynamics of the Association Reaction of Na+ and Br- Ions in (70, 80, 90, and 95 Mass per Cent) 2-Butanol + Water Mixtures

Ivo Tominić ; Laboratory of Physical Chemistry, Faculty of Technology, University of Split, Teslina 10, HR-21000 Split, Croatia
Vesna Sokol ; Laboratory of Physical Chemistry, Faculty of Technology, University of Split, Teslina 10, HR-21000 Split, Croatia
Ivica Mekjavić ; Laboratory of Physical Chemistry, Faculty of Technology, University of Split, Teslina 10, HR-21000 Split, Croatia


Puni tekst: engleski pdf 81 Kb

str. 705-714

preuzimanja: 384

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Sažetak

Molar conductivities of NaBr electrolyte in 2-butanol + water mixtures (w2-butanol = 0.7, 0.8, 0.9, 0.95 ) were mesaured in the temperature range from 288.15 to 308.15 K at 5 K intervals. By processing the obtained data using the conductivity equations after Fuoss-Hsia and Lee-Wheaton it was not possible to establish a reliable value for the distance of the ions in the ion-pairs formed (R). The processing was therefore repeated using the same equations with R = qBjerrum . The association constants (KA) obtained by both equations at different temperatures enable calculation of the standard thermodynamic quantities (ΔH° and Δ S°) for the association reaction. The obtained thermodynamic quantities, together with the limiting molar conductivity (Λ0), were compared with the analogous data from literature for HBr electrolyte in the same mixtures, and for NaBr electrolyte in t-butanol + water mixtures.

Ključne riječi

Hrčak ID:

132381

URI

https://hrcak.srce.hr/132381

Datum izdavanja:

1.10.1998.

Posjeta: 695 *