Thermochemistry of the dissolution and association of ionic liquids in aqueous and acetonitrile solutions

The enthalpies of dissolution for three ionic liquids in water and acetonitrile in the field of dilute solutions at 298.15 K are measured in a hermetic highly sensitive calorimeter equipped with an isothermal shell, along with the enthalpies of dilution for aqueous and acetonitrile solutions of the same compounds in moving from three different concentrations to ones that are approximately the same. The enthalpies and constants of the ionic association of such liquids as electrolytes in solutions are calculated, along with their standard enthalpies of dissolution in water and acetonitrile.