STUDIES ON DENSITIES AND VISCOSITIES OF BINARY-MIXTURES OF ALKYL BENZOATES IN N-HEPTANE

Densities and viscosities have been determined for the two binary mixt ures of methyl and ethyl benzoate in n-heptane at different concentrat ions and temperatures. The corresponding excess properties and the act ivation magnitudes were also calculated from the experimental data. Al l excess properties, including the excess Gibbs free energy of activat ion of flow, are negative over the entire range of compositions. The r esults for these binary mixtures are compared with those for methyl be nzoate with n-nonane, the molecular interactions occurring in the mixt ures being explained on the basis of the deviation from ideality of th e magnitudes studied.