Thermodynamics Research Center / ThermoML | Thermochimica Acta

Enthalpies of DL-a-alanyl-DL-a-asparagine solution in aqueous alcohols at 298.15 K

Smirnov, V. I.[Valeriy I.], Badelin, V. G.[Valentin G.]
Thermochim. Acta 2011, 512, 1-2, 55-8
ABSTRACT
The enthalpies of DL-a-alanyl-DL-a-asparagine (AlaAsn) solution have been measured in aqueous solutions of methanol, ethanol, 1-propanol and 2-propanol with a mole fraction from x2 = (0 to 0.4) at T = 298.15 K. The experimental results have been used to calculate the enthalpies of transfer of AlaAsn from water to these solutions and the enthalpy coefficients of pair-wise interactions (hxy) between AlaAsn and alcohol molecules in water, basing on the McMillan-Mayer's model. The coefficients have been found to be positive and increasing in the methanol less than ethanol less than 1-propanol less than 2- propanol series.
Compounds
# Formula Name
1 C7H13N3O4 alanylasparagine
2 CH4O methanol
3 C2H6O ethanol
4 C3H8O propan-1-ol
5 C3H8O propan-2-ol
6 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
  • 1
  • 6
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Mole fraction - 1; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • ISOPERIBOL
  • 1
  • POMD
  • 2
  • 1
  • 6
  • 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
  • 12
  • POMD
  • 3
  • 1
  • 6
  • 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
  • 12
  • POMD
  • 4
  • 1
  • 6
  • 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
  • 12
  • POMD
  • 5
  • 1
  • 6
  • 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
  • 12