ABSTRACT

The dielectric spectra corresponding to the static regime of dimethyl sulfoxide + water mixtures were recorded in the whole concentration range and in the temperature range from (253.15 to 333.15) K. For the mixtures rich in DMSO (0.60 less than xDMSO ? 1, x = mole fraction) and rich in water (0 ? xDMSO less than 0.1), it was possible to perform the investigations both in the liquid and solid phases of the samples. The determined melting temperatures were compared to the data available in the literature. The deviation from the additivity of the measured static permittivity of DMSO + water mixtures shows a maximum for xDMSO = 0.35, indicating formation at that concentration of intermolecular entities (most probably they are 1DMSO*2H2O hydrogen-bonded complexes) of a relatively enhanced polarity.

Compounds

#	Formula	Name
1	C2H6OS	dimethyl sulfoxide
2	H2O	water

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 melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	OTHER::sMethod:Derived from relative static permittivity measurements of the liquid and solid states	1
POMD	1	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	OTHER::sMethod:impedance/gain phase analyzer	22
POMD	2	Normal melting temperature, K ; Crystal			Crystal Liquid Air at 1 atmosphere	OTHER::sMethod:Derived from relative static permittivity measurements of the liquid and solid states	1
POMD	2	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	OTHER::sMethod:impedance/gain phase analyzer	31
POMD	1 2	Relative permittivity at zero frequency ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	impedance/gain phase analyzer	363
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	Derived from relative static permittivity measurements of the liquid and solid states	8
POMD	1 2	Solid-liquid equilibrium temperature, K ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 2	Derived from relative static permittivity measurements of the liquid and solid states	2

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

Relative Static Permittivity of Dimethyl Sulfoxide + Water Mixtures

Plowas, I.[Iwona], Swiergiel, J.[Jolanta], Jadzyn, J.[Jan]

ABSTRACT