ABSTRACT

The dissolution enthalpies of a-alanyl-a-alanine in aqueous methanol, ethanol, 1-propanol and 2-propanol solutions with an alcohol content up to 0.4 mole fractions have been measured calorimetrically at T = 298.15 K. The standard enthalpies of dissolution, and transfer, , of a-alanyl-a- alanine from water into mixed solvents and the enthalpy coefficients of pair-wise interactions, hxy, of a-alanyl-a-alanine with alcohol solvent molecules have been calculated. The results are discussed in terms of solute-solute and solute-solvent interactions.

Compounds

#	Formula	Name
1	C6H12N2O3	.beta.-alanine, N-.beta.-alanyl-
2	H2O	water
3	CH4O	methanol
4	C2H6O	ethanol
5	C3H8O	propan-1-ol
6	C3H8O	propan-2-ol

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	Molar enthalpy of solution, kJ/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 1; Liquid		Liquid	ISOPERIBOL	1
POMD	3 1 2	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 1; Liquid	Liquid	ISOPERIBOL	12
POMD	4 1 2	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 1; Liquid	Liquid	ISOPERIBOL	12
POMD	5 1 2	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 5; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 1; Liquid	Liquid	ISOPERIBOL	12
POMD	6 1 2	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 6; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Molality, mol/kg - 1; Liquid	Liquid	ISOPERIBOL	12

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Dependence of enthalpies of dissolution of A-alanyl- A-alanine on the composition of (water+ alcohol) mixtures at 298.15 K

Smirnov, V. I.[Valeriy I.], Badelin, V. G.[Valentin G.]

ABSTRACT