Theoretical Evaluation of Sound Velocities in Binary Liquid Mixtures of Triethylamine (AB Interactions)

Sound velocities in binary mixtures of triethylamine (A), a weakly polar molecule, with alcohol or phenol (B), have been calculated theoretically based on Free Length Theory (F.L.T.) due to Jacobson and Collision Factor Theory (C.F.T.) due to Schaaffs. The results are presented along with the experimental values. The larger deviations in velocities in mixtures calculated, based on F.L.T., are explained in the light of the interactions between the molecules of triethylamine and alcohol or phenol (AB interactions). It appears C.F.T. is to be preferred in these mixtures.