Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Effect of temperature on the solubility of 3-aminopyridine in binary ethanol + toluene solvent mixtures

Wei, D.[Dongwei], Li, H.[Hui], Li, Y.-n.[Ya-nan], Zhu, J.[Jing]
Fluid Phase Equilib. 2012, 316, 132-134
ABSTRACT
The solubility of 3-aminopyridine in (ethanol + toluene) mixed solvents has been measured between 283.15 and 323.15 K at intervals of 5.00 K by a static analytical method. Nonlinear dependences were found for the variation of solubility with temperature. The nonlinear van't Hoff equation was proposed for correlating the experimental data. The apparent molar enthalpies of 3-aminopyridine in the solvent mixtures were determined from the temperature dependence of the solubilities. The values for the apparent Gibbs energy and the apparent entropy of solution are calculated.
Compounds
# Formula Name
1 C5H6N2 .beta.-aminopyridine
2 C2H6O ethanol
3 C7H8 toluene
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
  • Normal melting temperature, K ; Crystal
  • Crystal
  • Liquid
  • Air at 1 atmosphere
  • VISOBS
  • 1
  • POMD
  • 3
  • 1
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • OTHER::sMethod:UV spectrophotometry
  • 9
  • POMD
  • 2
  • 1
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • UV spectrophotometry
  • 9
  • POMD
  • 2
  • 3
  • 1
  • Mole fraction - 1 ; Liquid
  • Solvent: Mass fraction - 2; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • UV spectrophotometry
  • 54