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Some thermodynamic properties of binary molten mixtures from alkaline earth and alkali metal chlorides

H. H Emons, G. Braeutigam, and R. Thomas

Sekt. Chem., Anorg.-Tech. Chem., Tech. Hochsch. 'Carl Schorlemmer', Merseburg, Fed. Rep. Ger.


Abstract:  Thermodynamic quantities ai, fi, ∆GE, ∆HE, and ∆SE were calculated on the basis of vapour pressure measurements in molten mixtures of the type alkaline earth metal chloride—alkali metal chloride. For the systems CaCl2 —KCl, SrCl2—(Na, K)C1, and BaCl2 —(Na, K)Cl there is a good agreement with the corresponding values determined by means of other methods (EMF-measurements, cryoscopy). The thermodynamic quantities calculated for the systems RbCl—(Ca, Sr, Ba)Cl2 indicate a pronounced negative deviation from ideality. As to the enthalpy of mixing, the experimentally determined values agree within the experimental error with the values calculated on the basis of the temperature dependence of the free enthalpy.

Full paper in Portable Document Format: 326a721.pdf (in German)


Chemical Papers 32 (6) 721–733 (1978)

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