Temperature Variation of Ultrasonic Velocity in Liquids

Abstract

Measurements have been made of the ultrasonic velocity in thirty-four organic liquids over a temperature range of 0−60°C by use of a variable-path ultrasonic interferometer operating at 500,000 cycles per second. For all of the liquids studied the relation between velocity and temperature was found to be essentially linear. Values of density, adiabatic compressibility, and temperature coefficient (ΔV/ΔT) are also reported. It was found that the successive substitution of a heavier atom in a molecule leads to successively smaller temperature coefficients. It is pointed out that the temperature coefficient of ultrasonic velocity appears to be inversely proportional to the square root of the molecular weight, to a fair degree of accuracy.

Speed of sound in liquid tetrachloromethane and benzene at temperatures from 283.15 K to 333.15 K and pressures up to 30 MPa

“…[14]; Ã, Kiyohara and Arakawa [12]; d, Bobik et al [10]; s, Lainez et al [13]. (b) M, Lagemann et al [11]; O, Richardson and Tait [14]; s, Deshpande and Bhatgadde [18]; Ã, Kiyohara and Arakawa [12]; d, Bobik [17]; N,…”

“…Bobik et al [11] measured the speed of sound in liquid tetrachloromethane by a pulse-echo technique in the temperature range from (265 to 435) K and pres- sures up to about 60 MPa. Their values at p ¼ 0:1 MPa are about 0.4 percent higher than the present data as indicated in figure 4(a), and the deviations decrease to +0.2 percent with increasing pressure.…”

Thermodynamic properties of organic iodine compounds

“…The reviewed measurements were originally reported by Bridgman (1933), Lysne (1972), Kumagai and Iwasaki (1978), Dick (1981), and Verveiko et al (1991). Density values have also been reported for liquid iodobenzene as a function of temperature by Lagemann et al (1949). Additional density values at 25°C and 1 bar found in the literature are listed in Table 1.…”

“…Standard molal volume of iodobenzene (C 6 H 5 I) liquid as a function of temperature at 1 bar. The symbols correspond to V values computed from densities reported byLagemann et al (1949). The straight line represents a linear regression of these data and is consistent with Eq.…”

“…This value is also consistent with experimental data for the solubilities of both liquid and gas iodobenzene (see below). Density values reported by Lagemann et al (1949) for iodobenzene liquid between 10 and 50°C have been converted to their standard molal volume counterparts (V ), which have been plotted as symbols in Fig. 22.…”