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Thermodynamics of HfCl/sub 4/-KCl molten mixtures containing HfCl/sub 4/ up to 33. 3 mol. per cent

Journal Article:

Abstract

Based on measurements of saturated vapour pressure in components of melted mixtures of HfCl/sub 4/-KCl, depending on temperature and concentration, calculated are the results of changes in activity coefficients of hafnium tetrachloride and potassium chloride on transition from diluted solutions, where the Henry law is met, to those concentrated where the law is disobeyed. Growth in the activity coefficient of HfCl/sub 4/ is due to dissociation of complex groups of HfCl/sub 6//sup 2 -/ into complexes with a lesser number of ligands and decreasing relative binding energy of Hf/sup 4 +/-Cl/sup -/ there. In this case, marked changes take place in partial enthalpy and entropy of hafnium tetrachloride mixing. Similar dependences are observed for potassium chloride, but they are expressed considerably weaker. Evaporation enthalpy and entropy are calculated for HfCl/sub 4/ and KCl monomers from their melted mixtures of various concentrations.
Authors:
Smirnov, M V; Salyulev, A B; Kudyakov, V Ya [1] 
  1. AN SSSR, Sverdlovsk. Inst. Ehlektrokhimii
Publication Date:
May 01, 1980
Product Type:
Journal Article
Reference Number:
AIX-12-580728; EDB-81-027204
Resource Relation:
Journal Name: Zh. Neorg. Khim.; (USSR); Journal Volume: 25:5
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; HAFNIUM CHLORIDES; THERMODYNAMICS; VAPOR PRESSURE; POTASSIUM CHLORIDES; BINARY MIXTURES; ENTROPY; MOLTEN SALTS; QUANTITY RATIO; TEMPERATURE DEPENDENCE; VAPORIZATION HEAT; ALKALI METAL COMPOUNDS; CHLORIDES; CHLORINE COMPOUNDS; DISPERSIONS; ENTHALPY; HAFNIUM COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; MIXTURES; PHYSICAL PROPERTIES; POTASSIUM COMPOUNDS; SALTS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION HEAT; 400201* - Chemical & Physicochemical Properties
OSTI ID:
6696765
Country of Origin:
USSR
Language:
Russian
Other Identifying Numbers:
Journal ID: CODEN: ZNOKA
Submitting Site:
INIS
Size:
Pages: 1190-1193
Announcement Date:

Journal Article:

Citation Formats

Smirnov, M V, Salyulev, A B, and Kudyakov, V Ya. Thermodynamics of HfCl/sub 4/-KCl molten mixtures containing HfCl/sub 4/ up to 33. 3 mol. per cent. USSR: N. p., 1980. Web.
Smirnov, M V, Salyulev, A B, & Kudyakov, V Ya. Thermodynamics of HfCl/sub 4/-KCl molten mixtures containing HfCl/sub 4/ up to 33. 3 mol. per cent. USSR.
Smirnov, M V, Salyulev, A B, and Kudyakov, V Ya. 1980. "Thermodynamics of HfCl/sub 4/-KCl molten mixtures containing HfCl/sub 4/ up to 33. 3 mol. per cent." USSR.
@misc{etde_6696765,
title = {Thermodynamics of HfCl/sub 4/-KCl molten mixtures containing HfCl/sub 4/ up to 33. 3 mol. per cent}
author = {Smirnov, M V, Salyulev, A B, and Kudyakov, V Ya}
abstractNote = {Based on measurements of saturated vapour pressure in components of melted mixtures of HfCl/sub 4/-KCl, depending on temperature and concentration, calculated are the results of changes in activity coefficients of hafnium tetrachloride and potassium chloride on transition from diluted solutions, where the Henry law is met, to those concentrated where the law is disobeyed. Growth in the activity coefficient of HfCl/sub 4/ is due to dissociation of complex groups of HfCl/sub 6//sup 2 -/ into complexes with a lesser number of ligands and decreasing relative binding energy of Hf/sup 4 +/-Cl/sup -/ there. In this case, marked changes take place in partial enthalpy and entropy of hafnium tetrachloride mixing. Similar dependences are observed for potassium chloride, but they are expressed considerably weaker. Evaporation enthalpy and entropy are calculated for HfCl/sub 4/ and KCl monomers from their melted mixtures of various concentrations.}
journal = {Zh. Neorg. Khim.; (USSR)}
volume = {25:5}
journal type = {AC}
place = {USSR}
year = {1980}
month = {May}
}