Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Evaluation of the vapour pressure of aqueous NaCl-sorbitol solution and correlation of the water activity on composition and temperature

Desuque, A. M.[Augusto M.], Passamonti, F. J.[Francisco J.], Chialvo, A. C.[Abel C.]
Fluid Phase Equilib. 2016, 415, 84-87
ABSTRACT
The vapour pressure over water (1) sodium chloride (2) and sorbitol (3) ternary solutions of different concentrations (m_i .LE. 4, i: 2,3) was measured at 338 K and 348 K. Starting from these data, the values of the experimental water activity (a1) were calculated. These data and those obtained for other authors at 293 K, 298 K and 308 K were correlated with a previously developed equation for a1(m2, m3). Thus, the equation parameters and their corresponding temperature dependences were obtained. The corresponding root mean square deviation was evaluated, being in all cases less than 0.005.
Compounds
# Formula Name
1 ClNa sodium chloride
2 C6H14O6 D-sorbitol
3 H2O water
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
  • 2
  • 1
  • 3
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Molality, mol/kg - 2; Liquid
  • Liquid
  • Gas
  • Manometric method
  • 82