Thermodynamics Research Center / ThermoML | Thermochimica Acta

Conductivity, Density and Adiabatic Compressibility of 1-Butyl-2,3-dimethylimidazolium chloride in Aqueous Solutions

Pal, A.[Amalendu], Chaudhary, S.[Sheena]
Thermochim. Acta 2013, 573, 200-5
ABSTRACT
Conductivities, densities and speeds of sound of 1-butyl-2,3-dimethylimidazolium chloride in aqueous solutions were measured at 15, 25, and 35 0C. These data have been used to characterize the aggregation process of imidazolium based ionic liquid in the aqueous solution. The critical aggregation concentration (cac) and the degree of ionization, , were determined by conductivity measurements. Both quantities were used to calculate the standard free energy change of aggregation, . It shows decrease in and upon growth of temperature. From density data for the ionic liquid, the apparent molar volume, , was calculated. The adiabatic compressibility, , changes in adiabatic compressibility upon aggregation, , and apparent adiabatic compressibilities, , were calculated from measurements of density and ultrasound velocity. Good agreement has been found when comparing with the aggregation properties of 1-butyl-2,3-dimethylimidazolium chloride both from conductivity and molar volume approach.
Compounds
# Formula Name
1 C9H17ClN2 1-butyl-2,3-dimethylimidazolium 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
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 33
  • POMD
  • 2
  • 1
  • Speed of sound, m/s ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Sing-around technique in a fixed-path interferometer
  • 33
  • POMD
  • 2
  • 1
  • Electrical conductivity, S/m ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 117