ABSTRACT

Speed of sound and density data for dilute aqueous solutions of several alkane-?,?-diols (ethane-1,2-diol, pentane-1,5-diol, hexane-1,6-diol, octane-1,8-diol, nonane-1,9-diol) were obtained using the Anton Paar DSA 5000 vibrating-tube densimeter and sound analyzer in the temperature range from (278.15 to 318.15) K and at atmospheric pressure. Standard molar isentropic compressions and standard molar volumes were evaluated from the measured data. Relations of the two standard quantities to the ratio between hydrophilic (hydroxyl groups) and hydrophobic (hydrocarbon chain) parts of the solute molecule are discussed. Contributions of the methylene group to the standard molar volume and standard molar isentropic compression are also evaluated.

Compounds

#	Formula	Name
1	C2H6O2	1,2-ethanediol
2	H2O	water
3	C5H12O2	1,5-pentanediol
4	C6H14O2	1,6-hexanediol
5	C8H18O2	1,8-octanediol
6	C9H20O2	1,9-nonanediol

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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	138
POMD	1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Pulse-echo method	138
POMD	3 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	138
POMD	3 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Pulse-echo method	138
POMD	4 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	117
POMD	4 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Pulse-echo method	117
POMD	5 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	139
POMD	5 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid	Liquid	Pulse-echo method	144
POMD	6 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	120
POMD	6 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid	Liquid	Pulse-echo method	120

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

Partial Molar Volumes and Partial Molar Isentropic Compressions of Selected Alkane-?,?-diols at Infinite Dilution in Water at Temperatures T = (278 to 318) K and Atmospheric Pressure

Hnedkovsky, L.[Lubomir], Cibulka, I.[Ivan]

ABSTRACT