Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Asymmetric criticality of ionic solution containing 1-hexyl-3-methylimidazolium tetrafluoroborate and 2-propanol

Zhang, X.[Xianshuo], Xu, C.[Chen], Zheng, P.[Peizhu], Yin, T.[Tianxiang], Shen, W.[Weiguo]
J. Chem. Thermodyn. 2016, 100, 116-123
ABSTRACT
The liquid liquid coexistence curve for binary solution {2-propanol + 1-hexyl-3-methylimidazolium tetrafluoroborate ([C6mim][BF4])} has been measured. The isobaric heat capacities per unit volume were obtained in both critical and non-critical regions. The critical exponents a and b were deduced and showed good agreement with those predicted for the 3D-Ising universality class. The asymmetric behaviour of the diameter of the coexistence curve was analysed based on the complete scaling theory, which indicated that the heat capacity related term plays an important role in describing the asymmetric behaviour of the coexistence curve. Furthermore, the RPM (restricted primitive model)-rescaled critical parameters were calculated and suggested the solvophobic criticality for this system.
Compounds
# Formula Name
1 C3H8O propan-2-ol
2 C10H19BF4N2 1-hexyl-3-methylimidazolium tetrafluoroborate
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
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Minimum deviation angle method
  • 6
  • POMD
  • 2
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Minimum deviation angle method
  • 8
  • POMD
  • 1
  • 2
  • Upper consolute temperature, K ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • VISOBS
  • 1
  • POMD
  • 1
  • 2
  • Upper consolute composition: mole fraction - 2 ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • equal volume method
  • 1
  • POMD
  • 1
  • 2
  • Refractive index (other wavelength) ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Wavelength, nm; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Minimum deviation angle method
  • 41
  • POMD
  • 1
  • 2
  • Refractive index (other wavelength) ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Wavelength, nm; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Minimum deviation angle method
  • 41
  • POMD
  • 1
  • 2
  • Mole fraction - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Index of refraction calibration data
  • 41
  • POMD
  • 1
  • 2
  • Mole fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Index of refraction calibration data
  • 41
  • POMD
  • 1
  • 2
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Minimum deviation angle method
  • 68
  • POMD
  • 1
  • 2
  • Heat capacity at constant pressure per volume, J/K/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 2; Liquid
  • Liquid
  • DSC
  • 193