Thermodynamic Properties of Alkali Nitrate—Silver Nitrate Melts

1972 ◽  
Vol 27 (1) ◽  
pp. 141-148 ◽  
Author(s):  
J. Richter ◽  
S. Sehm
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Silver Nitrate ◽  
Linear Dependence ◽  
Molten Salts ◽  
Total Concentration ◽  
Calorimetric Data ◽  
Gibbs Function ◽  
Emf Measurements ◽  
Analytical Construction

Abstract EMF measurements were performed on a chemical cell containing a silver and a nitrate electrode. The systems NaNO3 + AgNO3 , LiNO3 + AgNO3, and pure AgNO3 were investigated in a temperature range of 240 °C to 310 °C and in the total concentration range permitted by the phase diagram. We found a linear dependence of the EMF on temperature. Six constants, characteristic for the investigated molten salts depending neither on composition nor on temperature, were determined by the analytical construction of the activity coefficients. Together with the analytically constructed excess molar Gibbs function, the excess molar entropy was calculated from calorimetric data in the literature.

scholarly journals Thermodynamic Study of Tl6SBr4 Compound and Some Regularities in Thermodynamic Properties of Thallium Chalcohalides

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Dunya Mahammad Babanly ◽  
Qorkhmaz Mansur Huseynov ◽  
Ziya Saxaveddin Aliev ◽  
Dilgam Babir Tagiyev ◽  
Mahammad Baba Babanly
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Chemical Bonding ◽  
Electromotive Force ◽  
Solid Phase ◽  
Thermodynamic Study ◽  
Degree Of Ionization ◽  
Emf Measurements ◽  
Concentration Cells

The solid-phase diagram of the Tl-TlBr-S system was clarified and the fundamental thermodynamic properties of Tl6SBr4 compound were studied on the basis of electromotive force (EMF) measurements of concentration cells relative to a thallium electrode. The EMF results were used to calculate the relative partial thermodynamic functions of thallium in alloys and the standard integral thermodynamic functions (-ΔfG0, -ΔfH0, and S0298) of Tl6SBr4 compound. All data regarding thermodynamic properties of thallium chalcogen-halides are generalized and comparatively analyzed. Consequently, certain regularities between thermodynamic functions of thallium chalcogen-halides and their binary constituents as well as degree of ionization (DI) of chemical bonding were revealed.

Calculation of phase diagrams and thermodynamic properties of 18 binary common-ion systems of Na,K,Ba//F,MoO4,WO4

1996 ◽  
Vol 74 (3) ◽  
pp. 402-418 ◽  
Author(s):  
James Malcolm Sangster
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Phase Diagrams ◽  
Molten Salts ◽  
Literature Search ◽  
Phase Diagram Data ◽  
Excess Properties ◽  
Common Ion ◽  
Salt Systems ◽  
Critical Literature

Phase diagram and thermodynamic data of 18 binary common-ion molten salt systems in Na,K,Ba//F,MoO4,WO4 were optimized by computer algorithm. The phase diagram data as well as single-salt data were retrieved from an extensive critical literature search. Expressions for the excess properties of solution phases and thermodynamic properties of intermediate compounds were thereby obtained. These data were used to generate a "best" phase diagram for each binary system considered. Key words: molten salts, phase diagrams, thermodynamic properties.

Experimentelle Bestimmung von Interdiffusionskoeffizienten in Nitratschmelzen / Experimental Determination of Interdiffusion Coefficients in Nitrate Melts

1973 ◽  
Vol 28 (3-4) ◽  
pp. 492-496
Author(s):  
Joachim Richter
Keyword(s):  
Silver Nitrate ◽  
Experimental Determination ◽  
Mole Fraction ◽  
Total Concentration ◽  
Emf Measurements ◽  
Cell Method ◽  
Diaphragm Cell ◽  
Interdiffusion Coefficients

AbstractThe interdiffusion coefficients of the systems NaNO3+AgNO3 at 290 °C in the concentration range 0.25 ≦ x2 ≦ 1.0 (x2 mole fraction of the silver nitrate) and LiNO3 + AgNO3 at 260 °C in the total concentration range are determined by the diaphragm cell method. The dependence on time of the composition of the melt in the two compartments of the cell is followed up by emf-measurements. To that end we propose a new plotting method.

Phase diagram of the Sb–Te–I system and thermodynamic properties of SbTeI

2012 ◽  
Vol 103 (3) ◽  
pp. 290-295 ◽  
Author(s):  
Ziya S. Aliev ◽  
Mahammad B. Babanly ◽  
Andrei V. Shevelkov ◽  
Dunya M. Babanly ◽  
Jean-Claude Tedenac
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties

Phase diagram and thermodynamic properties of the LaI3–RbI binary system

Calphad ◽  
2020 ◽  
Vol 70 ◽  
pp. 101809
Author(s):  
Leszek Rycerz ◽  
Jan Kapała ◽  
Beata Salamon ◽  
Irena Szczygieł ◽  
Marcelle Gaune-Escard
Keyword(s):  
Phase Diagram ◽  
Binary System ◽  
Thermodynamic Properties

Calculation of phase diagrams and thermodynamic properties of 14 additive and reciprocal ternary systems containing Li2CO3, Na2CO3, K2CO3, Li2SO4, Na2SO4, K2SO4, LiOH, NaOH, and KOH

1984 ◽  
Vol 62 (3) ◽  
pp. 457-474 ◽  
Author(s):  
A. D. Pelton ◽  
C. W. Bale ◽  
P. L. Lin
Keyword(s):  
Phase Diagram ◽  
Thermodynamic Properties ◽  
Molten Salt ◽  
Phase Diagrams ◽  
Binary Systems ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
Ternary Systems ◽  
Maximum Error ◽  
Critical Assessment

Phase diagrams and thermodynamic properties of five additive molten salt ternary systems and nine reciprocal molten salt ternary systems containing the ions Li+, Na+, [Formula: see text], OH− are calculated from the thermodynamic properties of their binary subsystems which were obtained previously by a critical assessment of the thermodynamic data and the phase diagrams in these binary systems. Thermodynamic properties of ternary liquid phases are estimated from the binary properties by means of the Conformal Ionic Solution Theory. The ternary phase diagrams are then calculated from these thermodynamic properties by means of computer programs designed for the purpose. It is found that a ternary phase diagram can generally be calculated in this way with a maximum error about twice that of the maximum error in the binary phase diagrams upon which the calculations are based. If, in addition, some reliable ternary phase diagram measurements are available, these can be used to obtain small ternary correction terms. In this way, ternary phase diagram measurements can be smoothed and the isotherms drawn in a thermodynamically correct way. The thermodynamic approach permits experimental data to be critically assessed in the light of thermodynamic principles and accepted solution models. A critical assessment of error limits on all the calculated ternary diagrams is made, and suggestions as to which composition regions merit further experimental study are given.

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