ABSTRACT

Isothermal P-x (VLE) and excess enthalpy (HE) data for the two binary systems propylene oxide + 2-methylpentane and difluoromethane + pentafluoroethane were measured by means of the static technique and an isothermal flow calorimeter, respectively. The experimental data are presented using temperature-dependent interaction parameters for the NRTL model which were fitted simultaneously to all measured data. From the experimental P-x data the azeotropic conditions were determined for both systems. The experimental results from this work were compared with the data of other authors.

Compounds

#	Formula	Name
1	C3H6O	methyloxirane
2	C6H14	2-methylpentane
3	CH2F2	difluoromethane
4	C2HF5	pentafluoroethane

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 2	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Flow calorimetry	19
POMD	1 2	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 1; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	44
POMD	1 2	Azeotropic composition: mole fraction - 1 ; Liquid	Temperature, K; Liquid		Liquid Gas	By X=Y	1
POMD	1 2	Azeotropic composition: mole fraction - 1 ; Liquid	Pressure, kPa; Liquid		Liquid Gas	By X=Y	1
POMD	3 4	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Flow calorimetry	19
POMD	3 4	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 3; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	36
POMD	3 4	Azeotropic composition: mole fraction - 3 ; Liquid	Pressure, kPa; Liquid		Liquid Gas	By X=Y	1
POMD	3 4	Azeotropic composition: mole fraction - 3 ; Liquid	Temperature, K; Liquid		Liquid Gas	By X=Y	1

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

Isothermal Vapor-Liquid Equilibrium and Excess Enthalpy Data for the Binary Systems Propylene oxide + 2-Methylpentane and Difluoromethane (R32) + Pentafluoroethane (R125)

Horstmann, S.[Sven], Wilken, M.[Michael], Fischer, K.[Kai], Gmehling, J.

ABSTRACT