Volumetric behaviour of binary mixtures of (trichloromethane + amines) at temperatures between T = (288.15 and 303.15) K at p = 0.1 MPa

In this work, densities of binary mixtures of {trichloromethane (TCM) +  n -butylamine ( n -BA), or +  s -butylamine ( s -BA), or + diethylamine (DEA), or + triethylamine (TEA)} have been determined under atmospheric pressure as a function of composition and temperature using a vibrating-tube densimeter. The temperatures studied were T  = (288.15, 293.15, 298.15, and 303.15) K. The excess molar volumes ( V m E ) , calculated from density data are negative for all studied systems and the negative deviations follow the sequence: TEA > DEA >  s -BA >  n -BA. Negative values of V m E for binary mixtures were attributed to the formation of hydrogen bonding and of a charge transfer complex between TCM and amines and to structural effects. The partial molar volumes at infinite dilution of each component ( V ¯ i oo ) have been determined using three different methods.