Viscosity and Density for Binary Mixtures of Carbon Tetrachloride + Chloroform, Carbon Tetrachloride + Dichloromethane, and Chloroform + Dichloromethane and One Ternary Mixture of Chloroform + 1:1 (Carbon Tetrachloride + Dichloromethane) at 303.15 K

Viscosity and density have been measured for three binary mixtures of chlorinated methanes, that is, carbon tetrachloride + chloroform, carbon tetrachloride + dichloromethane, and chloroform + dichloromethane, and for one ternary mixture of 1:1 mole ratio (carbon tetrachloride + dichloromethane) + chloroform at 303.15 K. Molar excess volumes V E and viscosity deviations were obtained for these mixtures. Molecular interactions have been interpreted from the results. There are very weak specific interactions between CCl 4 and CH 2 Cl 2 or between CCl 4 and CHCl 3 . There are relatively stronger specific interactions between CHCl 3 and CH 2 Cl 2 . The interactions between different chlorinated methanes decrease in the order CH 2 Cl 2 - - - CHCl 3 > CCl 4 - - - CH 2 Cl 2 > CCl 4 - - - CHCl 3 . The interactions are considered to be caused mainly by the differences in polarity, size, and shape between different component molecules.