ABSTRACT

Excess molar enthalpies for a series of ethylene glycol + alkanol (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, and 2-butanol) systems were measured over the entire molar composition range at (298.15, 308.15, and 323.15) K under atmospheric pressure using a flow-type isothermal microcalorimeter. The values of HE increase slightly with increasing temperature for all of the ethylene glycol + n-alkanol (methanol, ethanol, 1-propanol, and 1-butanol) systems over the entire composition range. In addition, a dependence of HE on the chain length of the n-alkanol was observed. However, the same temperature dependency as in the ethylene glycol + n-alkanol systems was not observed for ethylene glycol + 2-alkanol (2-propanol and 2-butanol) systems. The experimental results were compared with values correlated using the Redlich-Kister equation.

Compounds

#	Formula	Name
1	C2H6O2	1,2-ethanediol
2	CH4O	methanol
3	C2H6O	ethanol
4	C3H8O	propan-1-ol
5	C3H8O	propan-2-ol
6	C4H10O	butan-1-ol
7	C4H10O	butan-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	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	VIBTUB:mpoint:UFactor:4	1
POMD	2	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	VIBTUB:mpoint:UFactor:4	1
POMD	3	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	VIBTUB:mpoint:UFactor:4	1
POMD	4	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	VIBTUB:mpoint:UFactor:4	1
POMD	5	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	VIBTUB:mpoint:UFactor:4	1
POMD	6	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	VIBTUB:mpoint:UFactor:4	1
POMD	7	Normal boiling temperature, K ; Liquid			Liquid Gas	Ebulliometric method (Recirculating still)	1
POMD	7	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	VIBTUB:mpoint:UFactor:4	1
POMD	2 1	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Flow calorimetry	57
POMD	3 1	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Flow calorimetry	57
POMD	4 1	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Flow calorimetry	57
POMD	6 1	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Flow calorimetry	57
POMD	5 1	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Flow calorimetry	57
POMD	7 1	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Flow calorimetry	57

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Measurement and Correlation of Excess Molar Enthalpies for Ethylene Glycol + Alkanol Systems at the Temperatures (298.15, 308.15, and 323.15) K

Nagashima, A.[Akinori], Yoshii, S.[Shigetaka], Matsuda, H.[Hiroyuki], Ochi, K.[Kenji]

ABSTRACT