ABSTRACT

Viscosity and surface tension were measured for binary mixtures of N,N-dimethylformamide DMF with pentan-1-ol, hexan-1-ol, and heptan-1-ol at T = (298.15, 303.15, 308.15, and 313.15) K and atmospheric pressure over the entire mole fraction range. Deviations in viscosity and surface tension were calculated using experimental results. Moreover, the values of the excess Gibbs free energy of activation, surface enthalpy and surface entropy of these mixtures were determined. Viscosity measurements of the binary systems were correlated with Grunberg and Nissan, the three-body and four-body McAllister expressions. Viscosity deviation, surface tension deviation and excess Gibbs energy of activation functions were fitted to the method of Redlich-Kister (R-K) polynomial to estimate the coefficients and standard deviations. The effects of chain length of alkan-1-ols and temperature on the thermodynamic properties of binary systems were studied.

Compounds

#	Formula	Name
1	C3H7NO	dimethylformamide
2	C5H12O	pentan-1-ol
3	C6H14O	hexan-1-ol
4	C7H16O	heptan-1-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 (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	1	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Gas	Wilhelmy plate	1
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Concentric cylinders viscometry	1
POMD	2	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	2	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Gas	Wilhelmy plate	1
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Concentric cylinders viscometry	1
POMD	3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Concentric cylinders viscometry	1
POMD	4	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Standard Abbe refractometry	1
POMD	4	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid		Liquid Gas	Wilhelmy plate	1
POMD	4	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Concentric cylinders viscometry	1
POMD	1 2	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid		Liquid Gas	Wilhelmy plate	44
POMD	1 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	44
POMD	1 3	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid		Liquid Gas	Wilhelmy plate	44
POMD	1 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	44
POMD	1 4	Surface tension liquid-gas, N/m ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid		Liquid Gas	Wilhelmy plate	44
POMD	1 4	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	44

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Viscosity and surface tension of binary systems of N,N-dimethylformamide with alkan-1-ols at different temperatures

Mohammad, A. A.[Abubaker A.], Alkhaldi, K. H. A. E.[Khaled H. A. E.], AlTuwaim, M. S.[Mohammad S.], Al-Jimaz, A. S.[Adel S.]

ABSTRACT