Sl. Oswal et al., Speed of sound and isentropic compressibility of binary mixtures containing alkyl acetate or ethyl alkanoate, or ethyl bromo-alkanoate with hexane., J MOL LIQ, 94(3), 2001, pp. 203-219
Isentropic compressibilities ics, excess isentropic compressibilities kappa
(E)(S) have been determined from measurements of speeds of sound u and den
sities rho of eleven binary mixtures of alkyl acetate, or ethyl alkanoate,
or ethyl bromoalkanoate with hexane at 303.15 K. Variable degree of polynom
ials were fitted to results. The values of kappa (E)(S) regularly decrease
with number of carbon atoms of the alkanoate going from positive values for
methyl acetate + hexane to negative values for dodecyl acetate + hexane. T
he values of kappa (E)(S) for all four-ethyl bromoalkanoate mixtures are hi
ghly negative and their magnitude depends on the type of bromoester and the
position of Br- atom in ethyl bromoalkanoates. The experimental speeds of
sound have been analyzed in terms of collision factor theory (CFT), free le
ngth theory (FLT) and Prigogine-Flory-Patterson statistical theory (PFPT) o
f solutions. (C) 2001 Elsevier Science B.V. All rights reserved.