ABSTRACT

The density () and viscosity () of three amino acids, glycine, l-alanine, and l-valine, have been determined as a function of amino acid concentration in aqueous solutions of 0.1011, 0.3088, and 0.5245 mol*kg 1 sodium benzoate at temperatures 303.15, 308.15, and 313.15 K. Apparent molar volumes (V), limiting values of apparent molar volumes (V0), and transfer volumes (tV0) have been calculated from the density data. The viscosity data could be fit to the Jones Dole equation, and B coefficients and variation of B with temperature dB/dT were obtained at different concentrations and temperatures. Free energies of activation of the solvent (micro10) and solute (micro20) were also calculated by application of the Eyring transition-state theory. The obtained thermophysical data have been interpreted in terms of the structure of the amino acids and their interactions with the sodium benzoate solution.

Compounds

#	Formula	Name
1	C7H5NaO2	sodium benzoate
2	C2H5NO2	2-aminoacetic acid
3	C3H7NO2	(S)-2-aminopropanoic acid
4	C5H11NO2	L-valine
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	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	5
POMD	2 1 5	Mass density, kg/m3 ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	120
POMD	2 1 5	Viscosity, Pa*s ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	90
POMD	3 1 5	Mass density, kg/m3 ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	120
POMD	3 1 5	Viscosity, Pa*s ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	90
POMD	4 1 5	Mass density, kg/m3 ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	120
POMD	4 1 5	Viscosity, Pa*s ; Liquid	Solvent: Molality, mol/kg - 1; Liquid Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	90
POMD	2 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	27
POMD	1 5	Mass density, kg/m3 ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	22
POMD	1 5	Viscosity, Pa*s ; Liquid	Molality, mol/kg - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	21
POMD	3 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	27
POMD	4 5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	27

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

Density and Viscosity Study of Interactions of Some Amino Acids in Aqueous Solutions of Sodium Benzoate

Haghani, A.[Abdolhossein], Iloukhani, H.[Hossein], Hoffmann, M. M.[Markus M.]

ABSTRACT