Thermodynamics Research Center / ThermoML | International Journal of Thermophysics

Thermophysical Properties of Ionic Liquid, 1-Pentyl-3-methylimidazolium chloride in Water at Different temperatures

Shekaari, H.[Hemayat], Mousavi, S. S.[Sedighehnaz S.], Mansoori, Y.[Yagoub]
Int. J. Thermophys. 2009, 30, 2, 499-514
ABSTRACT
Osmotic coefficients, , electrical conductance data, ?, and refractive indices nD of aqueous solutions of ionic liquid, 1-pentyl-3-methylimidazolium chloride [PnMIm]Cl have been measured at T = (298.15, 308.15, 318.15, and 328.15) K. Measurements of osmotic coefficients were carried out by the vapor pressure osmometry method (VPO). Osmotic coefficient values show that ion-solvent interactions are stronger at low temperature. The osmotic coefficients were correlated to the Pitzer ion-interaction and modified NRTL (MNRTL) models. From these data, mean activity coefficients, +- and excess Gibbs free energies, GE have been calculated. Electrical conductance data have been applied for determination of association constants, Ka, limiting molar conductance, ?0, using low concentration Chemical model (lcCM).Calculated ion-association constant, Ka, values represent that ion-association effects increase at high temperatures which is in agreement with osmotic coefficient results. Experimental results of refractive indices for binary system are reported, and have been fitted by a polynomial expansion.
Compounds
# Formula Name
1 C9H17ClN2 1-methyl-3-pentylimidazolium chloride
2 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
  • Osmotic coefficient ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Liquid
  • Gas
  • vapor pressure osmometry
  • 76
  • POMD
  • 2
  • 1
  • Molar conductivity, S*m2/mol ; Liquid
  • Temperature, K; Liquid
  • Amount concentration (molarity), mol/dm3 - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Direct current cell with electrodes
  • 76
  • POMD
  • 2
  • 1
  • Refractive index (Na D-line) ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Standard Abbe refractometry
  • 76