Densities, viscosities, and refractive indices of mixing of acetophenone with 2-alkanols, namely, 2-propanol, 2-butanol, 2-pentanol, 2-hexanol, and 2-heptanol, have been measured as a function of composition range at T ) 298.15 K and ambient pressure. Excess molar volumes Vm E , viscosity deviations Δη, and refractive index deviations ΔnD were calculated and correlated by the Redlich-Kister type function to derive the coefficients and estimate the standard error. For mixtures of acetophenone with used 2-alkanols, Vm E is positive, except with 2-propanol over the entire range of the composition. Δη is negative, and ΔnD is positive over the entire range of mole fraction. The effect of chain length of the 2-alkanols on the excess molar volumes, viscosity, and refractive index deviations of its mixtures with acetophenone is discussed. The experimental results have been used to test the applicability of the Prigogine-Flory-Patterson (PFP) theory. The agreement between theoretical and experimental results is satisfactory for acetophenone + 2-alkanol s
