Thermodynamic properties of n-alkoxyethanols plus organic solvent mixtures. XI. Total vapor pressure measurements for n-hexane, cyclohexane or n-heptane+2-ethoxyethanol at 303.15 and 323.15 K

Total vapor pressures at 303.15 and 323.15 K were measured for binary syste ms of n-hexane, cyclohexane, or n-heptane + 2-ethoxyethanol. Measurements w ere made with a Van Ness type apparatus and were fitted to the modified Mar gules equation using Barker's method. The five-parameter modified Margules equation represents the measurements to within an average absolute deviatio n of approximately 0.01 kPa. The measurements reveal positive deviations fr om Raoult's law. Mixtures with n-heptane and cyclohexane show azeotropic be havior at both temperatures.