Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Liquid-liquid phase equilibrium and heat capacity of binary solution {2-propanol + 1-octyl-3-methylimidazolium hexafluorophosphate}

Guo, Y.[Yimin], Zhang, X.[Xianshuo], Xu, C.[Chen], Shen, W.[Weiguo]
J. Chem. Thermodyn. 2017, 105, 434-442
ABSTRACT
The liquid-liquid coexistence curve and the heat capacity for binary solution of {2-propanol + 1-octyl-3- methylimidazolium hexafluorophosphate} have been precisely measured. The values of the critical exponents a and b, characterizing the critical anomalies of the heat capacity and the coexistence curve respectively, were deduced and found to be consistent with theoretical predictions. The asymmetric behavior of the diameter of the coexistence curve was studied in the frame of the complete scaling theory, demonstrating that the heat capacity related term is of importance. Furthermore, the restricted primitive model (RPM) was used to calculate the reduced upper consolute temperature and density, which together with a comparative larger value of A+ indicated a character of solvophobic criticality.
Compounds
# Formula Name
1 C12H23F6N2P 1-octyl-3-methylimidazolium hexafluorophosphate
2 C3H8O propan-2-ol
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 method
  • 8
  • POMD
  • 2
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • minimum deviation method
  • 8
  • POMD
  • 2
  • 1
  • Upper consolute composition: mole fraction - 1 ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • "equal volume" method
  • 1
  • POMD
  • 2
  • 1
  • Upper consolute temperature, K ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Air at 1 atmosphere
  • VISOBS
  • 1
  • POMD
  • 2
  • 1
  • 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 method
  • 45
  • POMD
  • 2
  • 1
  • 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 method
  • 45
  • POMD
  • 2
  • 1
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Index of refraction calibration data
  • 45
  • POMD
  • 2
  • 1
  • Mole fraction - 1 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Index of refraction calibration data
  • 45
  • POMD
  • 2
  • 1
  • Refractive index (other wavelength) ; Liquid
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • minimum deviation method
  • 85
  • POMD
  • 2
  • 1
  • Heat capacity at constant pressure per volume, J/K/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 1; Liquid
  • Liquid
  • DSC
  • 120