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Ultrasonic velocities and densities of the ternary liquid mixtures of tetrahydrofuran, heptanes and decane have been measured at temperatures 303 K, 308 K and 313 K over the entire composition range of mole fractions. The theoretical values of ultrasonic velocity were evaluated using Nomoto's Relation (UNR), Junjie's Method (UJM), Ideal Mixing Relation (UIMR), Free Length Theory (U FLT), Collision Factor Theory (UCFT) and Impedance Dependence Relation (UIDR). Theoretical values are compared with the experimental values and the validity of the theories is checked by calculating the average percentage error (APE).

Theoretical Evaluation of Ultrasonic Velocities in Ternary Liquid Mixture of Tetrahydrofuran, Heptane and Decane at Different Temperatures