Some Properties of Compressional Waves in Lennard-Jones and Devonshire Liquids. I. Weak Sound Waves

Abstract

The present paper describes some calculations of the speed of sound u in a theoretical Lennard-Jones and Devonshire liquid. It is found that u decreases as the temperature is raised, but increases if the liquid is compressed. When quantum effects are considered it is found that u decreases as the value of de Boer's quanta1 parameter Λ* is increased. All these effects have been observed in experiments on real liquids.