Ultrasonic relaxation in liquid nonanoic acid. The variation of the ultrasonic spectrum with temperature

Abstract

The ultrasonic attenuation in liquid nonanoic acid (pelargonic) is measured between 16 and 55°C. A single relaxation phenomenon is pointed out at 16 and 25°C, in the ultrasonic range. At 35, 45 and 55°C, two relaxation phenomena are evident. One of the two phenomena disappears in the solution state.