In this work vapor pressures and activity coefficients at infinite dilution (gamma(infinity)(i)) were measured using a newly commissioned ebulliometer (a noninvasive phase equilibrium measurement device), that has been modified with the view to improve the precision and measurement time of the apparatus, as well as the effects of superheating. The systems considered were C2-C4 n-alcohols with three different classes of solvents (ester, n-alkane, ketone), namely, (ethanol/propan-1-ol/butan-1-ol) + (ethyl acetate, n-octane, butan-2-one). The temperature range considered was T = (303.15 to 343.15) K, which corresponded to subatmospheric conditions. The gamma(infinity)(i) data were correlated empirically for temperature using standard procedures. A portion of the gamma(infinity)(i) data measured are available in the literature and compared well with an acceptable correlation for this type of data, for the majority of the systems considered. The data were also compared to extrapolations of gamma(infinity)(i) from reliable vapor-liquid equilibrium data. Vapor-liquid equilibrium predictions were also made from the limiting activity coefficients and established that the presence of azeotropes and their temperature dependence were correlated from the measured gamma(infinity)(i).