ABSTRACT

The liquid-liquid coexistence curve in a temperature range of about 8 K from the upper consolute point and the specific isobaric heat capacity in a wide temperature range for the critical binary solution of {n-decane + benzonitrile} have been precisely measured. The upper consolute mole fraction xc of benzonitrile and the upper consolute temperature Tc were determined to be xc = 0.530, Tc = 286.930 K, respectively. From the data collected near the upper consolute point, the critical exponents corresponding to the heat capacity and the coexistence curve were deduced and found to be consistent with the theoretical predictions of the 3D-Ising universality. The chain-length dependences of the critical properties were investigated, and the asymmetric behavior of the coexistence curve was analyzed based on the complete scaling theory, which confirmed that the heat capacity related term was of importance.

Compounds

#	Formula	Name
1	C7H5N	benzonitrile
2	C10H22	decane

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 technique	10
POMD	2	Refractive index (other wavelength) ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Wavelength, nm; Liquid	Liquid	minimum deviation angle technique	10
POMD	1 2	Upper consolute temperature, K ; Liquid mixture 1			Liquid mixture 1 Liquid mixture 2 Air at 1 atmosphere	equal volume method	1
POMD	1 2	Upper consolute composition: mole fraction - 1 ; 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 technique	33
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 technique	33
POMD	1 2	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	33
POMD	1 2	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	33
POMD	1 2	Refractive index (other wavelength) ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Wavelength, nm; Liquid	Liquid	minimum deviation angle technique	11
POMD	1 2	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 1; Liquid	Liquid	DSC	203

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Liquid-liquid equilibrium and heat capacity for the critical binary solution of {n-decane + benzonitrile}

Guo, Yimin, Liu, Shixia, Wang, Mingjie, Chen, Zhiyun, Shen, Weiguo

ABSTRACT