Densities and viscosities of binary liquid mixtures of trichloroethylene and tetrachloroethylene with methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, acetone, 2-butanone, methyl acetate, ethyl acetate, carbon tetrachloride, benzene, and toluene have been measured at 298.15 K. From the density and viscosity data, the values of viscosity deviations (deltaeta) and excess molar volumes (V-E) have been determined. Furthermore, the viscosities of binary liquid mixtures have been correlated to different viscosity models.