Ultrasonic-Velocity Measurements and B/A for 1-Propanol at Pressures to 10 000 kg/cm2

Sound-velocity data are reported for 1-propanol at 30°C and at pressures to 10 000 kg/cm2. It is found that the sound velocity varies with pressure at the rate of 0.59 m/sec kg−1 cm−2 initially. The rate of variation decreases as the pressure is raised, with the value at 8000 kg/cm2 being 0.106 m/sec kgminus;1 cm−2. The velocity at 10 000 kg/cm2, 2976 m/sec, is approximately two and one-half times that at 1 atm. From these velocity data, B/A′, the pressure-variation term in the nonlinearity parameter, is calculated over the same pressure range. It is found that B/A′ decreases with pressure at a decreasing rate so that the value at 10 000 kg/cm2 is only slightly more than one-half the atmospheric-pressure value of 11.3. These results are compared with the corresponding results for water, for which both velocity and B/A values have previously been published. An Appendix gives values of (B/A) for mercury at high pressures.