ULTRASONIC VELOCITY IN QUATERNARY LIQUID-MIXTURES

An attempt is made to evaluate the acoustical properties using the Flory statistical theory in conjunction with the empirical Altenberg relation which is less often used. Along with this the thermodynamic approach of Z. Junjie has also been extended to predict the ultrasonic velocity of quaternary liquid mixtures. The comparative merits of all three of the relations is studied. Based on experimental evidence, it is concluded that Altenberg's relation should be used in preference to the Auerbach relation, while Junjie's relation can also be safely used in some multicomponent liquid mixtures.