Integral enthalpy of solution, osmotic and activity coefficients of transition metal sulfates

• Autorzy: Przepiera A. , Kalbarczyk A.
• Języki publikacji: EN

Abstrakty

EN

The integral enthalpy of solution of transition metal sulfates in water as a solvent, have been measured using isoperibol calorimeter. Measurements were carried out at ambient temperature. The enthalpy of solution has been measured as a function of molality. Enthalpy of solution at infinite dilution was estimated by extrapolation experimental data. These data have been fitted with a Pitzer ion-interaction model with an ionic strength dependent second virial coefficient. Pitzer's model has been also used to calculate osmotic coefficient and activity coefficient. These data fill a gap in the thermodynamic database and make possible planning industrial process, in which one can use transition metal sulfates.

Słowa kluczowe

EN

integral enthalpy of solution; activity coefficient; osmotic coefficient; Pitzer's model; aqueous electrolytes; transition metals sulfates

PL

entalpia roztworu; współczynnik aktywności; współczynnik osmotyczny; model Pitzera; elektrolit wodny; siarczan metali przejściowych

• Wydawca: Centrum Materiałów Polimerowych i Węglowych PAN
• Czasopismo: Polish Journal of Applied Chemistry
• Rocznik: 2006
• Tom: Vol. 50, nr 3-4
• Strony: 55--63
• Opis fizyczny: Bibliogr. 6 poz.

Twórcy

autor

Przepiera A.

autor

Kalbarczyk A.

• Szczecin University of Technology, Institute of Chemistry and Environmental Protection, Al. Piastów 42, 71-065 Szczecin,

Bibliografia

• [1] M. EL GEENDOUZI, A. MONIR, A. DINANE, Water activity, osmotic and activity coefficients of aqueous solutions of Li2SO4, Na2SO4, K2SO4, (NH4)2SO4, MnSO4, CuSO4 and ZnSO4 at T = 298.15 K, J. Chem. Thermodynamics, 35, 209-220 (2003).
• [2] W. ZIELENKIEWICZ, Measurement of heat effect. Methodology and applications, ed. Warszawska Drukarnia Naukowa, 2000 (in polish).
• [3] M. EL GUENDOUZI, A. BENBIYI, A. DLNANE, R. AZOUGEN, Determination of water activities and osmotic and activity coefficients, Computer Coupling of Phase Diagrams and Thermochemistry, 27, 375-381 (2003).
• [4] P. Marliacy, N. Hubert, L. Schuffenecker, R. SOLIMANDO, Use of Pitzer's model to calculate thermodynamic properties, Fluid Phase Equilibria, 148, (1998).
• [5] Activity coefficient in electrolyte solutions, Ed. K.S. PITZER, CRC Press, Boca Raton, 1991, 95-100.
• [6] A.. PRZEPIERA, Solubility equilibria of salts in electrolyte solutions MeSO4-H2SO4-H2O systems, ed. Wydawnictwo Uczelniane Politechniki Szczecinskiej, Szczecin, 1999 (in polish).