Apparent molar volumes, temperatures of maximum density and osmotic coefficients of dilute aqueous hexamethylenetetramine solutions

Abstract

Apparent molar volumes for solutions of hexamethylenetetramine are determined over a wide range of concentrations, using both pyknometric and dilatometric techniques, at 5, 15 and 25 °C. The temperatures of maximum density of dilute aqueous solutions of hexamethylenetetramine are found. The osmotic coefficient and solute activity coefficient are determined at 25 °C for hexamethylenetetramine using the isopiestic technique. Theories of dilute solutions are applied to solute–solute and solute–solvent interactions, assuming a rigid particle model for the repulsive potential.