Speeds of sound, isentropic compressibilities, and excess volumes of binary mixtures of acrylonitrile with organic solvents

The isentropic compressibilities K-S, excess isentropic compressibilities K -S(E), and excess molar volumes V-E have been determined from the measureme nts of speeds of sound u and densities rho of seven binary mixtures of acry lonitrile with ethanenitrile, methyl acetate, ethyl acetate, n-butyl acetat e, dimethylformamide, dimethylacetamide, and dimethyl sulfoxide at 303.15 K . Variable-degree polynomials were fitted to the results. The values of the excess functions indicate a varying extent of molecular interaction and in terstitial accommodation between unlike components. The experimental speeds of sound have been analyzed in terms of the collision factor theory of Sch aaffs (Molekularakustik; Springer-Verlag: Berlin, 1963) and the free length theory of Jacobson (Acta Chern. Scand. A 1952, 6, 1485-1498).