ABSTRACT

Thermodynamic functions of complex formation of 15-crown-5 ether (15C5) with sodium cation (Na+) in the mixtures of water (W) with methanol (MeOH) at different temperature 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 but entropy destabilized.

Compounds

#	Formula	Name
1	CH4O	methanol
2	INa	sodium iodide
3	C10H20O5	1,4,7,10,13-pentaoxacyclopentadecane
4	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 2 3	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 2; Liquid	Liquid	ISOPERIBOL	4
POMD	2 4 3	Molar enthalpy of solution, kJ/mol ; Liquid	Molality, mol/kg - 3; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid Solvent: Amount concentration (molarity), mol/dm3 - 2; Liquid	Liquid	ISOPERIBOL	4

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Effect of temperature on the process of complex formation crown ether 15C5 with Na+ in the mixture of water with methanol

Jozwiak, M.[Malgorzata], Madej-Kielbik, L.[Longina]

ABSTRACT