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