ABSTRACT

Densities of l-alanine/l-glutamine/glycylglycine + 0.512 mol*kg 1 aqueous K2SO4/KNO3 systems have been measured for several molal concentrations of amino acids/peptide at different temperatures from T = (298.15 to 323.15) K using a density and sound velocity meter (Anton Paar DSA, 5000 m). Using the density data the partial molar volumes (v0) and transfer partial molar volumes (?trv0) have been calculated. The measured and calculated thermodynamic parameters have been discussed in terms of zwitterion ion, zwitterion water dipole, ion water dipole, and ion ion interactions operative in the systems.

Compounds

#	Formula	Name
1	H2O	water
2	K2O4S	potassium sulfate
3	KNO3	potassium nitrate
4	C3H7NO2	(S)-2-aminopropanoic acid
5	C5H10N2O3	L-glutamine
6	C4H8N2O3	glycylglycine

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	Pressure, kPa; Liquid Molality, mol/kg - 2; Liquid	Liquid	VIBTUB:UFactor:4	6
POMD	1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 3; Liquid	Liquid	VIBTUB:UFactor:4	6
POMD	4 1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 2; Liquid	Liquid	VIBTUB:UFactor:4	42
POMD	4 1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid	Liquid	VIBTUB:UFactor:4	42
POMD	5 1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 2; Liquid	Liquid	VIBTUB:UFactor:4	42
POMD	5 1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid	Liquid	VIBTUB:UFactor:4	42
POMD	6 1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 2; Liquid	Liquid	VIBTUB:UFactor:4	42
POMD	6 1 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid	Liquid	VIBTUB:UFactor:4	42

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

Transfer Partial Molar Volumes of L-Alanine/L-Glutamine/Glycylglycine from Water to 0.512 mol/kg Aqueous KNO3/K2SO4 Solutions at (298.15 to 323.15) K

Riyazuddeen, Gazal, U.[Umaima]

ABSTRACT