Thermodynamic Properties of <i>n</i>-Alkoxyethanols + Organic Solvent Mixtures. XI. Total Vapor Pressure Measurements for <i>n</i>-Hexane, Cyclohexane or <i>n</i>-Heptane + 2-Ethoxyethanol at 303.15 and 323.15 K

Abstract

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