Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Measurement and correlation of excess molar enthalpy for(1,2-propanediol, or 1,3-propanediol, or 1,4-butanediol + water) at the temperatures (298.15, 323.15, and 343.15) K

Nagamachi, M. Y., Francesconi, A. Z.
J. Chem. Thermodyn. 2006, 38, 4, 461-466
ABSTRACT
The excess molar enthalpies for (1,2-propanediol, or 1,3-propanediol, or 1,4-butanediol + water) have been measured at three different temperatures under atmospheric pressure over the whole composition range using a modified 1455 Parr solution calorimeter. For the temperature range studied all the mixtures exhibit negative values for HEm being less negative with increasing temperature. The obtained values have been correlated by a model [M.Y. Nagamachi, Ph.D. Thesis, Universidade Estadual de Campinas, Brazil, 2001.] in which hydrophobic effects are considered. The calculated values are in good agreement with the experimental ones. The influence of methyl group of alkanediol on hydrophobic hydration as well as the influence of the position of OH groups on hydrophilic hydration is discussed.
Compounds
# Formula Name
1 C3H8O2 1,2-propanediol
2 C3H8O2 propan-1,3-diol
3 C4H10O2 1,4-butanediol
4 H2O water
5 C2H6O ethanol
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
  • 4
  • Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • CALVET:UFactor:2
  • 36
  • POMD
  • 2
  • 4
  • Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • CALVET:UFactor:2
  • 36
  • POMD
  • 3
  • 4
  • Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 3; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • CALVET:UFactor:2
  • 36
  • POMD
  • 5
  • 4
  • Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 5; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • CALVET:UFactor:2
  • 27