ABSTRACT

Apparent volumes VU of glycylglycine in aqueous NaX (X = F, Cl, and Br) solutions have been obtained from densities of their solutions at 298.15 K and 308.15 K measured by using a precise vibrating-tube digital densimeter. These values have been utilized in conjunction with the values in water to deduce partial molar volumes of transfer DtrsV U from water to different aqueous NaX solutions. DtrsV U values are positive. The interpretation is that these results arise from the dominant interaction of the NaX with the charged centers of glycylglycine. The results show that DtrsV U depend less on the temperature. Hydration numbers and interaction coefficients have been calculated from V U and DtrsV U values and the values have been interpreted in terms of various interactions.

Compounds

#	Formula	Name
1	C4H8N2O3	glycylglycine
2	ClK	potassium chloride
3	ClNa	sodium chloride
4	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 2 4	Apparent molar volume, m3/mol ; Liquid	Solvent: Molality, mol/kg - 2; Liquid Molality, mol/kg - 1; Liquid Mass density, kg/m3; Liquid	Temperature, K; Liquid	Liquid	Calculated with densities of this investigation	30
POMD	1 2 4	Apparent molar volume, m3/mol ; Liquid	Solvent: Molality, mol/kg - 2; Liquid Molality, mol/kg - 1; Liquid Mass density, kg/m3; Liquid	Temperature, K; Liquid	Liquid	Calculated with densities of this investigation	30
POMD	1 2 4	Mass density, kg/m3 ; Liquid	Solvent: Molality, mol/kg - 2; Liquid Molality, mol/kg - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	60
POMD	1 3 4	Apparent molar volume, m3/mol ; Liquid	Solvent: Molality, mol/kg - 3; Liquid Molality, mol/kg - 1; Liquid Mass density, kg/m3; Liquid	Temperature, K; Liquid	Liquid	Calculated with densities of this investigation	25
POMD	1 3 4	Apparent molar volume, m3/mol ; Liquid	Solvent: Molality, mol/kg - 3; Liquid Molality, mol/kg - 1; Liquid Mass density, kg/m3; Liquid	Temperature, K; Liquid	Liquid	Calculated with densities of this investigation	25
POMD	1 3 4	Mass density, kg/m3 ; Liquid	Solvent: Molality, mol/kg - 3; Liquid Molality, mol/kg - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	50

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

The limiting partial molar volume and transfer partial molar volume of glycylglycine in aqueous sodium halide solutions at 298.15 K and 308.15 K

Lin, G.[Guimei], Bian, P.[Pingfeng], Lin, R.[Ruisen]

ABSTRACT