Naslov
Thermodynamics of cadmium chloride in t-butanol - water mixtures (wt-BuOH = 10%, 30%, and 50%) from electromotive force measurements

Autori
Tomaš, Renato ; Višić, Marija ; Mekjavić, Ivica

Izvornik
Croatica chemica acta (0011-1643) 73 (2000), 2; 423-433

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
potentiometry; cadmium chloride; t-butanol-water mixtures; thermodynamic quantities; activity coefficients

Sažetak
The e.m.f. of the cell: Cd(Hg)(l, satd.)˝CdCl2 (m) in a mixture of t-butanol - water˝AgCl˝Ag with 10, 30 and 50 mass per cent alcohol was measured in the temperature range 293.15 - 313.15 K at 5 K intervals and in the molality range CdCl2 0.002 - 0.02 mol kg-1. From these values and using literature data for stability constants of the Cd chloride complexes, the values of the standard e.m.f. of the cell ( ) were obtained at each temperature. These values served to calculate the standard thermodynamic quantities (DrGo, DrHo and DrSo) for the cell reaction, the mean activity coefficients of CdCl2, and also the standard thermodynamic quantities (DtGo, DtHo and DtSo) for CdCl2 transfer from water to the investigated mixed solvents. All of the obtained values were compared with the values for 2-propanol - water and acetone - water mixtures; the values for DtHo and DtSo were also compared with those obtained for the transfer of electrolytes KCl, KBr and KI in the t-butanol - water mixtures. The values for enthalpy and entropy of the transfer provided an insight into the structure of the t-butanol - water mixtures.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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