ABSTRACT

The enthalpies of solution (?solHm) of ss-alanine in aqueous solutions of acetonitrile (AN), 1,4-dioxane (1,4-DO), acetone (AC), formamide (FA), N-methylformamide (MFA), N,N-dimethylformamide (DMFA), N,N-dimethylacetamide (DMA), and dimethyl sulfoxide (DMSO) have been determined by calorimetric method as a function of organic solvent concentration at 298.15 K. Enthalpies of transfer (?trHdeg ) of ss-alanine from water to aqueous organic mixtures as well as the enthalpy coefficients of pairwise interaction (hxy) were calculated from these data. The interrelation between enthalpy characteristics of ss-alanine dissolution (transfer) and the composition of water organic solvent binary mixtures has been ascertained. By means of a modified Kamlet Taft equation the contributions of different physicochemical properties of organic cosolvents to the energy of ss-alanine cosolvent intermolecular interactions have been estimated quantitatively.

Compounds

#	Formula	Name
1	C3H7NO2	3-aminopropanoic acid
2	C2H3N	acetonitrile
3	C4H8O2	1,4-dioxane
4	C3H6O	acetone
5	CH3NO	formamide
6	C2H5NO	N-methylformamide
7	C3H7NO	dimethylformamide
8	C4H9NO	N,N-dimethylethanamide
9	C2H6OS	dimethyl sulfoxide
10	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 1 10	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	ISOPERIBOL:UFactor:2	11
POMD	1 6 10	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	ISOPERIBOL:UFactor:2	11
POMD	7 1 10	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	ISOPERIBOL:UFactor:2	11
POMD	1 8 10	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 8; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	ISOPERIBOL:UFactor:2	11
POMD	2 1 10	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	ISOPERIBOL:UFactor:2	11
POMD	1 3 10	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	ISOPERIBOL:UFactor:2	11
POMD	4 1 10	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	ISOPERIBOL:UFactor:2	11
POMD	9 1 10	Molar enthalpy of solution, kJ/mol ; Liquid	Solvent: Molality, mol/kg - 9; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid	ISOPERIBOL:UFactor:2	11

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

Enthalpies of .beta.-Alanine Dissolution in Some Water + Organic Mixtures at 298.15 K

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

ABSTRACT