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Thermodynamics of the Cell: Cd(Hg)(l,satd.) | CdCl₂ (m) | AgCl | Ag in (10, 30 and 50 Mass per Cent) Acetone-Water Mixtures

Marija Višić ; Faculty of Natural Sciences and Arts, University of Split, Teslina 12, 21000 Split, Croatia
Ivica Mekjavić ; Laboratory of Physical Chemistry, Faculty of Technology, University of Split, Teslina 10, 21000 Split, Croatia

Sažetak

The e.m.f of the cell: Cd(Hg)(l,satd.) | CdCl2 (m), x mass per cent acetone-water mixture | AgCl(s) | Ag(s) with x = 10, 30 and 50 was measured in the temperature range from 293.15 to 313.15 K at 5 K intervals and in the molality range for CdCl2 from 0.002 to 0.02 mol kg-1. From the obtained values and using literature data for stability constants of cadmium chloride complexes, the standard e.m.f of the cell (E£) was determined for each temperature value.
The values for £„ were used to calculate: a) the standard thermodynamic quantities (AG°, AH° and AS0) for the cell reaction, b) the mean activity coefficients of CdCl2, and c) the standard thermodynamic quantities (AtG°, AtH° and AtS°) for transfer of CdCl2 from water to the investigated acetone-water mixtures. The values obtained were compared with analogous literature data for 2- propanol-water mixtures; the values obtained for AtH° and AtS° were also compared with analogous literature data for transfer of HBr electrolyte to the acetone-water and 2-propanol-water mixtures. The structure of these mixtures is discussed in view of the obtained values.

Ključne riječi

Hrčak ID:

135942

URI

https://hrcak.srce.hr/135942

Datum izdavanja:

4.3.1996.

Posjeta: 639 *