Thermodynamics Research Center / ThermoML | Thermochimica Acta

Influence of the composition of aqueous-alcohol solvents on the thermodynamic characteristics of Lphenylalanine dissolution at 298.15K

Badelin, V. G.[Valentin G.], Smirnov, V. I.[Valeriy I.]
Thermochim. Acta 2011, 526, 1-2, 46-9
ABSTRACT
The enthalpies of L-phenylalanine dissolution in aqueous methanol, ethanol, 1- propanol and 2-propanol have been determined by calorimetry at 298.15 K and alcohol mole fractions up to x2 ~ 0.4. The standard enthalpies of solution ( ss H sol ' ) and transfer ( ss H tr ' ) from water to the mixed solvent as well as the enthalpy coefficients of Lphenylalanine !V alcohol pair-wise interactions (hxy) were calculated. The interrelation of the enthalpies of dissolution and transfer for L-phenylalanine with structural features of alcohols has been determined. A comparative analysis of the thermodynamic characteristics of dissolution of L-phenylalanine and some other amino acids (glycine, L-alanine, L-threonine and L-valine) in the mixtures studied has been made.
Compounds
# Formula Name
1 CH4O methanol
2 C2H6O ethanol
3 C3H8O propan-1-ol
4 C3H8O propan-2-ol
5 H2O water
6 C9H11NO2 L-phenylalanine
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
  • 6
  • 5
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Molality, mol/kg - 6; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • ISOPERIBOL
  • 1
  • POMD
  • 6
  • 1
  • 5
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 1; Liquid
  • Molality, mol/kg - 6; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • ISOPERIBOL
  • 11
  • POMD
  • 6
  • 2
  • 5
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 2; Liquid
  • Molality, mol/kg - 6; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • ISOPERIBOL
  • 12
  • POMD
  • 6
  • 3
  • 5
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 3; Liquid
  • Molality, mol/kg - 6; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • ISOPERIBOL
  • 12
  • POMD
  • 6
  • 4
  • 5
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Solvent: Molality, mol/kg - 4; Liquid
  • Molality, mol/kg - 6; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • ISOPERIBOL
  • 12