ULTRASONIC STUDIES OF BINARY-MIXTURES OF TRIETHYLAMINE WITH AROMATIC-HYDROCARBONS AT 308.15-K

The ultrasonic sound velocity and density were measured of the binary mixtures of triethylamine with benzene, toluene, o-xylene, m-xylene, p -xylene and ethylbenzene respectively at 308.15 K. The ultrasonic soun d velocity data were used to compute isentropic compressibilities (K(S )). The deviations in the value of K(s) from ideality were computed. A ll the binary mixtures formed by triethylamine with aromatic hydrocarb ons at 308.15 K exhibit negative deviation from ideal behaviour over t he entire range of composition. The negative deviation indicates that the structure making effect is dominant in the mixtures. The ultrasoni c sound velocity of these mixtures have been analyzed in terms of free length theory, collision factor theory and Nomoto relation. The agree ment between theoretical and experimental values was fair for all the mixtures.