Thermodynamic properties of molten salt solutions

Conference · Fri Aug 15 04:00:00 EDT 1986

DOI:https://doi.org/10.1007/978-94-009-3863-2_2· OSTI ID:6725569

Blander, M

Why is it important to understand the thermodynamic properties of molten salt solutions, and what aspect of these properties is most important. In technologies and sciences where molten salts, slags or magmas are used or studied, one often must calculate the extent of a chemical reaction or of phase equilibria. In order to do this we need to know an equilibrium constant which can be generally written as ..delta..G/sup 0/ = RT1nK. The equilibrium constant K is a function of compositions and activity coefficients, the two quantities necessary to define chemical potentials, ..mu.. K = K(X,..gamma..). Thus, in order to calculate the concentrations of the final equilibrium product, X, one needs a knowledge of ..delta..G/sup 0/ and of the activity coefficients ..gamma... The calculation of ..delta..G/sup 0/, the standard free energy change for reactants and products in their standard states (generally the pure salts) is obtained from calorimetric data or other types of equilibrium data on pure compounds. I will not touch on this since this is another field and a large fraction of the data molten salt chemists need is already available. This paper investigates a way to calculate activity coefficients using chemical potentials. Mathematical models are presented for binary and ternary mixtures.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6725569
• Report Number(s): CONF-8608157-2; ON: DE87004948
• Country of Publication: United States
• Language: English

Related Subjects

657000* -- Theoretical & Mathematical Physics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BINARY MIXTURES
DISPERSIONS
EQUILIBRIUM
KINETICS
MATHEMATICAL MODELS
MIXTURES
MOLTEN SALTS
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
REACTION KINETICS
SALTS
SOLUBILITY
THERMODYNAMIC ACTIVITY
THERMODYNAMIC PROPERTIES
THERMODYNAMICS