ABSTRACT

Enthalpies of solution and densities of glycylglycine in aqueous solutions of NaNO3, NaClO4, and Na2SO4 were measured at 298.15 K. Standard transfer enthalpies (?trH0), standard transfer partial molar volume (?trV?0), and hydration numbers (Nh) have been determined for glycylglycine. All of the ?trH0 values are negative in the three salt solutions. The relative order of ?trH0 in the same concentration of 1 1 type salts is NaNO3 greater than NaClO4. The ?trH0 in low concentration of Na2SO4 solutions is between the corresponding values in NaNO3 and NaClO4 solutions. With increasing Na2SO4 concentration, the ?trH0 values exceed that in NaNO3 solutions. The ?trV?0 values are positive and vary in the sequence Na2SO4 greater than NaNO3 greater than NaClO4. The results were discussed in terms of various interactions.

Compounds

#	Formula	Name
1	C4H8N2O3	glycylglycine
2	NNaO3	sodium nitrate
3	ClNaO4	sodium perchlorate
4	Na2O4S	sodium sulfate
5	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 5	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	RD496-II microcalorimeter	7
POMD	1 2 5	Mass density, kg/m3 ; Liquid	Solvent: Molality, mol/kg - 2; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	36
POMD	1 3 5	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	RD496-II microcalorimeter	7
POMD	1 3 5	Mass density, kg/m3 ; Liquid	Solvent: Molality, mol/kg - 3; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	36
POMD	1 5 4	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	RD496-II microcalorimeter	7
POMD	1 5 4	Mass density, kg/m3 ; Liquid	Solvent: Molality, mol/kg - 4; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	36
POMD	2 5	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	6
POMD	3 5	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	6
POMD	5 4	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	6

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

Transfer Properties of Glycylglycine from Water to Aqueous NaNO3 CNaClO4 and Na2SO4 Solutions

Liu, C.[Chunli], Zhou, L.[Li], Fan, L.[Liqun], Ren, C.[Chonggui]

ABSTRACT