Thermodynamics of the Formation of Vanadium(II) Complexes in Chloride Melts

Autor: Polovov, Ilya B., Vasin, Boris D. D., Abakumov, Anton V. V., Rebrin, Oleg I. I., Chernyshov, Mikhail V. V., Volkovich, Vladimir A., Griffiths, Trevor R. R.
Zdroj: ECS Transactions; October 2007, Vol. 3 Issue: 35
Abstrakt: Vanadium equilibrium potentials were determined in NaCl-KCl equimolar melts containing 0.018 - 8.02 wt.% of vanadium between 690 and 820 oC. It was found that only vanadium(II) ions are present in the equilibrium with the metal. The temperature dependence of E*V2+/V formal standard potential was determined. Enthalpy and entropy change of the formation of vanadium(II) chloride in NaCl-KCl melt were determined. Hypothetical values of enthalpy and entropy change of the formation of super-cooled liquid vanadium(II) chloride were calculated. Enthalpy and entropy of mixing of VCl2 and NaCl-KCl were estimated.
Databáze: Supplemental Index