Thermodynamics Research Center / ThermoML | Thermochimica Acta

Solubility and solution thermodynamics of 2,5-thiophenedicarboxylic acid in (water + ethanol) binary solvent mixtures

Yang, Y.[Yang], Zhang, Q.[Qi], Cao, C.[Cuicui], Cheng, L.[Limin], Shi, Y.[Ying], Yang, W.[Wenge], Hu, Y.[Yonghong]
Thermochim. Acta 2014, 592, 52-57
ABSTRACT
In this paper, we focused on solubility and solution thermodynamics of 2,5-thiophenedicarboxylic acid. By gravimetric method, the solubility of 2,5-thiophenedicarboxylic acid was measured in (water + ethanol) binarysolventmixturesfrom278.15 K to 333.15 Kunderatmosphere pressure.Thesolubilitydatawere fitted using modified Apelblat equation, a variant of the combined nearly ideal binary solvent/Redlich Kister (CNIBS/R K) model and Jouyban Acree model. Computational results showed that the modified Apelblat equation has the lowest MD (mean deviation). In addition, the thermodynamic properties of the solution process, including the Gibbs energy, enthalpy, and entropy were calculated by the van t Hoff analysis.
Compounds
# Formula Name
1 C6H4O4S 2,5-thiophenedicarboxylic acid
2 C2H6O ethanol
3 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
  • 2
  • 1
  • 3
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Solvent: Mole fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • Phase equilibration
  • 96
  • POMD
  • 1
  • 3
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • Phase equilibration
  • 12
  • POMD
  • 2
  • 1
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • Phase equilibration
  • 12