The Vapor Pressures of Aqueous Solutions of Lithium Nitrate at 25°

The vapor pressures of aqueous solutions of lithium nitrate at 25° have been measured by the dynamic method for concentrations ranging from 0.1 M up to saturation. From the data obtained has been calculated the activity of the solute and solvent. The activity coefficients of the salt were calculated by means of the h function of Lewis and Randall. The free energy of dilution has been calculated. The activity coefficients show a minimum at about 0.6 M. The same thermodynamic properties for aqueous solutions of potassium chloride, potassium iodide and sodium bromide have been recalculated and compared