VAPOR-PRESSURES AND ENTHALPIES OF VAPORIZATION OF AQUEOUS-SOLUTIONS OF TRIETHYLAMMONIUM CHLORIDE, 2-HYDROXYETHYLAMMONIUM CHLORIDE, AND TRIS(HYDROXYMETHYL)AMINOMETHANE HYDROCHLORIDE

The vapor pressures of the aqueous solutions of three organic salts, t riethylammonium chloride, 2-hydroxyethylammonium chloride, and tris(hy droxymethyl)aminomethane hydrochloride were measured from 298.15 K to 333.15 K and regressed by the Patil et al. model. The vapor pressure d ata were used to calculate enthalpies of vaporization by the Clausius- Clayperon equation. The concentration of salt is from 0.5 mol.kg(-1) t o saturation depending on the solubility of that salt. The vapor press ures of the present aqueous solutions are not much different from thos e of three organic salts in our previous study.