Thermodynamics Research Center / ThermoML | Thermochimica Acta

Effect of temperature on the process of complex formation crownether 15C5 with Na+in the (water + ethanol) mixture at temperaturesfrom (293.15 to 308.15) K

Jozwiak, M.[Malgorzata], Madej-Kielbik, L.[Longina]
Thermochim. Acta 2014, 580, 13-19
ABSTRACT
Thermodynamic functions of complex formation of 15-crown-5 ether (15C5) with sodium cation (Na+) in the mixtures of water (W) with ethanol (EtOH) at different temperatures have been calculated. To obtain this function two experimental methods have been used. The equilibrium constants of complex formation have been determined by conductivity measurements and the enthalpic effect of complex formation has been measured by the calorimetric method and has been also calculated using van't Hoff's equation. The obtained results were compared and discussed. The complexes are enthalpy stabilized butentropy destabilized.
Compounds
# Formula Name
1 H2O water
2 C2H6O ethanol
3 C10H20O5 1,4,7,10,13-pentaoxacyclopentadecane
4 INa sodium iodide
5 ClK potassium chloride
6 CH4N2O urea
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
  • 4
  • 1
  • 3
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • ISOPERIBOL
  • 4
  • POMD
  • 2
  • 4
  • 3
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 3; Liquid
  • Pressure, kPa; Liquid
  • Solvent: Amount concentration (molarity), mol/dm3 - 4; Liquid
  • Liquid
  • ISOPERIBOL
  • 4
  • POMD
  • 5
  • 1
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Mole fraction - 5; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • ISOPERIBOL
  • 1
  • POMD
  • 6
  • 1
  • Molar enthalpy of solution, kJ/mol ; Liquid
  • Mole fraction - 6; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • ISOPERIBOL
  • 1