Enthalpies of dilution for 1:3 and 3:1 electrolytes aqueous solutions

Abstract

The enthalpies of dilution for aqueous solutions of [Co(cn)3)]Cl3, [Co(pn)3)]Cl3 and [Co(tn)3]Cl3, (where en = 1,2-diaminoethane, pn = 1,2-diaminopropane, and tn = 1,3-diaminopropane) have been measured at 298.15 K, and up to 1 mol kg-1, using a new large isoperibol calorimeter by the >long-jump> method. Relative apparent molar enthalpies. Lφ, have been extracted as an empirical equation relating Lφ and m. We have compared our complex salts with the 3:1 and 1:3 aqueous systems found in the literature. Theoretical predictions for 1:3 and 3:1 electrolytes in the Restricted Primitive Model are also shown. © 1996 Akadémiai Kiadó.