ABSTRACT

The experimental values of density ([rho]) and speed of sound (u) in aqueous solutions of L-threonine, L-valine and L-arginine are reported at T = (275.15, 279.15 and 283.15) K. The derived parameters, apparent molar volume of solute (V[phi]), isentropic compressibility (kS) of solution, apparent molar compressibility of solute (k[phi]) in dilute aqueous solutions of L-threonine, L-valine and L-arginine have been computed using values of density ([rho]) and speed of sound (u). The limiting values of apparent molar volume of solute (V[phi]0), apparent molar isentropic compressibility of solute (k[phi]0) and apparent molar expansivity ([phi]0E) are also obtained. The results are discussed in the light of solute-solvent interactions, and structure making and structure breaking abilities of the solute in aqueous medium. From the results obtained for d[phi]0E/dT, it has been observed that L-threonine behaves as a structure maker, whereas L-valine and L-arginine act as structure breakers when dissolved in water at temperatures studied in present work.

Compounds

#	Formula	Name
1	C4H9NO3	L-threonine
2	C5H11NO2	L-valine
3	C6H14N4O2	L-arginine
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	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	3
POMD	4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Linear variable-path acoustic interferometer	3
POMD	1 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	38
POMD	1 4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Linear variable-path acoustic interferometer	38
POMD	2 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	38
POMD	2 4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid	Liquid	Linear variable-path acoustic interferometer	38
POMD	3 4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	39
POMD	3 4	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid	Liquid	Linear variable-path acoustic interferometer	39

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Study of thermodynamic properties of aqueous binary mixtures of L-threonine, L-valine and L-arginine at low temperatures (T/K = 275.15, 279.15 and 283.15)

Dhondge, S. S.[Sudhakar S.], Paliwal, R.[Rashmi], Bhave, N. S. S. ].[Narayan S.]

ABSTRACT