Studies on the thermodynamics and conductances of molten salts and their mixtures. Part VII. The electrical conductance of sodium chlorate and its mixtures with sodium nitrate

1968 ◽  
Vol 46 (8) ◽  
pp. 1293-1296 ◽  
Author(s):  
A. N. Campbell ◽  
E. T. van der Kouwe
Keyword(s):  
Constant Temperature ◽  
Sodium Nitrate ◽  
Molten Salts ◽  
Electrical Conductance ◽  
Sodium Chlorate ◽  
Activation Energies ◽  
Constant Composition ◽  
Temperature Range ◽  
Molten Sodium

The specific and equivalent conductances of molten sodium chlorate and of its mixtures with sodium nitrate have been determined over the temperature range 240–280 °C. The results are treated as temperature functions at constant composition and as composition functions at constant temperature. From these data, the activation energies of conductance have been derived. The results have been compared with various theoretical equations and the conclusion is made that, while melts containing lithium chlorate may be associated or complexed in some way, the sodium chlorate melts show less of such a structure and are more ionic.

Studies on the thermodynamics and conductances of molten salts and their mixtures. Part V. The density, change of volume on fusion, viscosity, and surface tension of sodium chlorate and of its mixtures with sodium nitrate

1968 ◽  
Vol 46 (8) ◽  
pp. 1279-1286 ◽  
Author(s):  
A. N. Campbell ◽  
E. T. van der Kouwe
Keyword(s):  
Activation Energy ◽  
Surface Tension ◽  
Sodium Nitrate ◽  
Molten Salts ◽  
Sodium Chlorate ◽  
Surface Heat ◽  
Lithium Nitrate ◽  
Positive Deviation ◽  
Molten Sodium ◽  
Salt Melts

The densities, viscosities, and surface tensions of molten sodium chlorate, and of molten mixtures of sodium chlorate and sodium nitrate, as well as the change of volume on fusion, have been determined.From the dependence of molar volume on temperature and composition, it appears that the mixing of sodium chlorate and sodium nitrate is a process of dilution rather than of interaction. The viscosity of sodium chlorate is found to be much lower than that of lithium chlorate, a possible indication of greater complexity in the lithium chlorate melt. The activation energy of viscous flow for sodium chlorate is less than that of lithium chlorate. For lithium chlorate – lithium nitrate mixtures, at constant temperature, there is pronounced positive deviation from linearity, when viscosity is plotted against molar composition. For sodium chlorate – sodium nitrate mixtures, the deviation is much less marked though still positive.The surface tension of sodium chlorate is almost identical with those of lithium and potassium chlorates. The surface heat of sodium chlorate is higher than that of lithium chlorate but it still indicates some degree of covalency. The Guggenheim formula and Sokolov's rule have been applied. In contrast to melts of mixtures of lithium chlorate and lithium nitrate, the sodium salt melts would appear to have simpler constituents and to be more ionic in character.

Conductivities of Room Temperature Molten Salts Containing AlCl3, Measured by a Computerized Direct Current Method

2001 ◽  
Vol 56 (9-10) ◽  
pp. 670-676
Author(s):  
Hsin-Yi Hsu ◽  
Chao-Cheng Yang
Keyword(s):  
Molten Salt ◽  
Direct Current ◽  
Molten Salts ◽  
Room Temperature ◽  
Current Method ◽  
Activation Energies ◽  
Nium Chloride ◽  
Temperature Range ◽  
Different Temperatures ◽  
Salt Systems

Abstract The conductivities of the binary room-temperature molten salt systems AlCl3-N-n-butylpyridinium chloride (BPC), AlCl3-l-ethyl-3-methylimidazolium chloride (EMIC) and AlCl3-benzyltriethylammo-nium chloride (BTEAC) have been measured at different temperatures and compositions by a d.c. four-probes method. There is a maximum of the conductivity at 50 mol% AlCl3 in the AlCl3-BPC and AlCl3-EMIC systems at 40 to 80 °C, their activation energies being relatively low (20.79 and 14.76 kJ/mol, respec­ tively). As to the A1C13-BTEAC system, there is an irregular change in the conductivity at 40-70 mol% AlCl3 in the temperature range 50 to 80 °C. The conductivities of the three RTMS are in the order AlCl3-EMIC > AlCl3-BPC > AlCl3-BTEAC, the reason being discussed.

Studies on the thermodynamics and conductances of molten salts and their mixtures. Part VI. Calorimetric studies of sodium chlorate and its mixtures with sodium nitrate

1968 ◽  
Vol 46 (8) ◽  
pp. 1287-1291 ◽  
Author(s):  
A. N. Campbell ◽  
E. T. van der Kouwe
Keyword(s):  
Sodium Nitrate ◽  
Molten Salts ◽  
Sodium Chlorate ◽  
Heat Of Fusion ◽  
Heat Of Mixing ◽  
Lithium Nitrate ◽  
Entropy Of Fusion ◽  
Direct Experiment ◽  
Calorimetric Studies ◽  
Nitrate System

The following properties have been determined by direct experiment for pure sodium chlorate and its mixtures with sodium nitrate: heat capacity (both solid and liquid) and heat of fusion. From these experimental quantities, the following properties have been derived: entropy of fusion, heat of mixing, and free energy and entropy of mixing. The results have been compared with our previous results for the corresponding lithium chlorate – lithium nitrate system. On the whole, the conclusion is justified that the structure of melts containing lithium chlorate is more complex than that of melts involving sodium chlorate.

Notizen: Measurement of the Hypersonic Velocity in the Molten Salts NaCl and KCl

1979 ◽  
Vol 34 (7) ◽  
pp. 899-900
Author(s):  
Lena M. Torell ◽  
H. E. Gunilla Knape
Keyword(s):  
Molten Salts ◽  
Frequency Range ◽  
Melting Points ◽  
Hypersonic Velocity ◽  
Temperature Range ◽  
Molten Sodium ◽  
Sodium And Potassium

The hypersonic velocity of molten sodium and potassium chlorides has been measured over a temperature range of about 100°C above the melting points. The measurements were carried out at scattering angles 90° and 140°, cor­responding to a 6-10 GHz frequency range. No deviation from previous ultrasonic values of velocity was observed at these frequencies, indicating that the measurements were performed at frequencies lower than any relaxation fre­quency.

Sign in / Sign up

Export Citation Format

Share Document