ABSTRACT

The (liquid + liquid) coexistence curves, the isobaric heat capacities per unit volume and the turbidities for the binary solution of {heavy water + 2,6-dimethylpyridine} have been precisely measured. The values of the critical exponents were obtained, which confirmed the 3D-Ising universality. It was found that the critical temperature dropped by 5.9 K and the critical amplitude of the coexistence curve significantly increased as compared to the binary solution of {water + 2,6-dimethylpyridine}. The complete scaling theory was applied to well describe the asymmetric behavior of the diameter of the coexistence curve as the heat capacity contribution was considered. Moreover, the values of the critical amplitudes of the correlation length and the osmotic compressibility were deduced, which together with the critical amplitudes of the coexistence curve and the heat capacity to test universal amplitude ratios.

Compounds

#	Formula	Name
1	C7H9N	2,6-dimethylpyridine
2	D2O	water-d2

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	9
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	Lower consolute temperature, K ; Liquid mixture 1			Liquid mixture 1 Liquid mixture 2 Air at 1 atmosphere	equal volume method	1
POMD	1 2	Lower 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	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	46
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	46
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	46
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	46
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 method	16
POMD	1 2	Heat capacity at constant pressure per volume, J/K/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Mole fraction - 1; Liquid	Liquid	DSC	95

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

(Liquid + liquid) phase equilibrium and critical behavior of binary solution {heavy water + 2,6-dimethylpyridine}

Xu, C.[Chen], Chai, S.[Shouning], Yin, T.[Tianxiang], Chen, Z.[Zhiyun], Shen, W.[Weiguo]

ABSTRACT