Investigation of molar sound velocity in melts and solutions

Ultrasonic velocity studies are carried out in organic solutions of six low melting point organic solids and the melts of these solids. The constancy ofR is established over a wide range of temperature in the melt state. It is found thatR is strictly linear with concentration expressed in mole fraction of the solute and the average extrapolated value for 100% concentration of the solute is compared with that from the melt state and also with the theoretical computed values due toRao's atomic increment method andLagemann's bond increment method.