Ultrasonic Relaxation and the Vibrational Specific Heat of Carbon Disulphide

Abstract

Previous work has shown that the absorption of ultrasonic waves in liquid carbon disulphide is governed by a relaxation mechanism. The measurements reported from this work were made below the frequency of 70 Mc/s, which is near the centre of the dispersion range at 25°C. Combining these results with others reported by Rapuano in the frequency range 75Mc/s to 195Mc/s, led to the conclusion that the observed behaviour was associated with the time of transfer of energy to the degenerate bending vibration of the carbon disulphide molecule. Quantitative analysis of the results, however, was not regarded as satisfactory.