DETERMINATION OF THE THERMODYNAMIC PROPERTIES OF THE CYCLOHEXANE + n-OCTANE + n-HEXADECANE LIQUID MIXTURE BY THE ACOUSTIC METHOD

The propagation of sound in the ternary cyclohexane + n-octane + n-hexadecane mixture at temperatures of 298–433 K and pressures of 0.1–100.1 MPa was investigated experimentally. The maximum error in measuring the velocity of sound in this mixture was 0.1%. Experimental data on the velocity of sound in such a mixture were obtained for the fi rst time. On the basis of these data, the density, the isobaric expansion coeffi cient, the isobaric and isochoric heat capacities, and the isothermal compressibility of the indicated ternary mixture of three compositions at a temperature of 298–348 K and a pressure of 0.1–100 MPa and the deviation of the velocity of sound in it from the ideal one were determined. With the use of a number of semiempirical equations, the deviation of the velocity of sound in this mixture from the ideal one was estimated on the basis of the data on the velocity of sound in its pure components and in their binary compounds. A good agreement between the calculation and experimental data has been obtained. A table of the thermodynamic properties of the cyclohexane + n-octane + n-hexadecane mixture is presented
   
Author:  T. S. Khasanshin, N. V. Golubeva, V. S. Samuilov, and A. P. Shchemelev
Keywords:  cyclohexane, n-octane, n-dodecane, n-hexadecane, binary and ternary mixtures, velocity of sound, density, heat capacity, compressibility
Page:  812