Surface tensions and densities of solutions of large organic ions in molten pyridinium chloride

Abstract

Surface tension and density data obtained with cetyl and myristyl cationic soaps dissolved in molten pyridinium chloride at 155º are interpreted in terms of micelle formation. The critical micelle concentrations determined by each method are in agreement at 0.060 molal for the solute cetyldimethylbenzylammonium chloride. Partial molar volumas for this same solute are calculated and discussed in concepts similar to the "hydrophobic hydration" theory of aqueous solutions.