Ultrasonic velocity in and thermodynamic properties of benzene and carbon tetrachloride under pressures (The co-operative researches on the fundamental studies of the liquid phase reactions at high pressures)

Abstract

A new experimental apparatus for the accurate measurement of ultrasonic velocity in compressed liquids has been developed, employing the pulse technique and an electronic digital counter circuit. The sound velocity measurements are carried out in liquid benzene in the temperature range between 10 and 70℃ under pressures up to 2, 100atm, and in liquid carbon tetrachloride in the temperature range between 5 and 70℃ under pressures up to 2, 500atm, with an estimated accuracy better than 0.2 per cent. The freezing pressures of both liquids are also determined at several experimental temperatures. The adiabatic compressibility and the specific heat ratio are derived over the whole range of temperature and pressure.