ENTHALPIMETRIC STUDY OF TRANSFER OF HYDROXYLATED SOLUTES FROM WATER TO MICELLAR SOLUTIONS

In order to elucidate the role of cosurfactant molecules in micellar s olutions, the relative apparent molar enthalpies of dilution of a surf actant in aqueous solutions, and those of transfer from water to micel lar solutions of some hydroxylated compounds have been determined from the calorimetric heats of dilution at 25-degrees-C. From the analysis of experimental data, there are clearly evidenced the structural chan ges in the micellar structure as well as the effect of a solute which, depending on its nature, plays the role of a specific probe of its mi croscopic environment.