ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Cryometry in ternary-systems

J. Gabčová and M. Malinovský

Department of Chemical Technology of Inorganic Substances, Slovak Technical University, CS-812 37 Bratislava

Abstract: Cryometry on the basis of binary eutectic mixture as a method for determi­nation of partial molar enthalpies of fusion and partial molar enthalpies of mixing of components of the binary mixture is discussed. The relationships for cryometry on the basis of binary eutectic mixture are derived and it is pointed out that cryometry can be carried out also in the systems forming solid solutions. Conditions for correctness of cryometry in ternary systems are analyzed. From this thermodynamic analysis it follows that in ideal systems cryometry on the basis of binary eutectic mixture can be carried out successful­ly providing the molar enthalpies of fusion of the components of the binary mixture equal. However, from numerical examples it follows that even if the conditions for correctness of the cryometric method are not strictly fulfilled accuracy of the determination of the enthalpy of fusion of eutectic mixture from cryometric data may be influenced only negligibly.

Full paper in Portable Document Format: 402a187.pdf

Chemical Papers 40 (2) 187–200 (1986)