Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Densities of a dissolving mixture of molten (AgI + NaCl)

Stepanov, V. P., Kulik, N. P., Peshkina, K. G.
J. Chem. Thermodyn. 2013, 63, 84-87
ABSTRACT
The densities of a molten mixture of (0.5 AgI + 0.5 NaCl) were measured along the saturation line over a wide temperature range by the hydrostatic weight method to establish the peculiarities of the mixing of salts with different chemical bonds. We showed that the difference between the magnitudes of the densities for the coexisting phases decreases with increasing temperature and becomes equal to zero at 1063.5 K. This temperature corresponds to the critical phase transition point, Tc. The temperature dependence of the difference in densities, Dq, is described by equation Dq/qc Tc T Tc b , where qc is the density at Tc. The index b = 0.476 occurs at a lower value than that found for alkali halide melts (b = 0.52) where long-range Coulombic forces between ions prevail.
Compounds
# Formula Name
1 AgI silver iodide
2 ClNa sodium chloride
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Normal melting temperature, K ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • VISOBS
  • 1
  • POMD
  • 2
  • Normal melting temperature, K ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • VISOBS
  • 1
  • POMD
  • 2
  • 1
  • Mass density, kg/m3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Archimedean displacement method
  • 9
  • POMD
  • 2
  • 1
  • Mass density, kg/m3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Archimedean displacement method
  • 9
  • POMD
  • 2
  • 1
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 1; Liquid
  • Liquid
  • Archimedean displacement method
  • 7
  • POMD
  • 2
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS
  • 1