Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

The measurements of coexistence curves and light scattering for {xC6H5CN + (1 - x)CH3(CH2)16CH3} in the critical region

Wang, N.[Nong], Mao, C.[Chunfeng], Lu, R.[Ruixue], Peng, X.[Xuhong], An, X.[Xueqin], Shen, W.[Weiguo]
J. Chem. Thermodyn. 2006, 38, 3, 264-271
ABSTRACT
The coexistence curves and light scattering data for a critical solution of benzonitrile + octadecane have been reported. The critical exponents relating to the difference in density variables of two coexisting phases b, the correlation length m, and the osmotic compressibility c have been calculated. The experimental results of the coexistence curves have also been analyzed to examine the Wegner correction terms and the behavior of the diameter of the coexistence curves. The data analysis shows that the 3D-Ising behavior is valid in a temperature range close to the critical point. However in a wide temperature range the exponential values of m and c change with the temperature significantly, clearly exhibiting the critical crossover from the 3D-Ising universality class to the classical one.
Compounds
# Formula Name
1 C7H5N benzonitrile
2 C18H38 octadecane
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
  • Newport model 1825-C
  • 6
  • POMD
  • 2
  • Refractive index (other wavelength) ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Newport model 1825-C
  • 6
  • 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
  • Newport model 1825-C
  • 15
  • 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
  • Newport model 1825-C
  • 15
  • POMD
  • 1
  • 2
  • Refractive index (other wavelength) ; Liquid
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Wavelength, nm; Liquid
  • Liquid
  • Newport model 1825-C
  • 8
  • POMD
  • 1
  • 2
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • transmitted light intensity
  • 15
  • POMD
  • 1
  • 2
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 2
  • Mole fraction - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • transmitted light intensity
  • 15