Study on excess volume of ethyl alcohol-cyclohexane-n-heptane ternary

The excess volumes of ethyl alcohol-cyclohexane, cyclohexane-n-heptane and n-heptane-ethyl alcohol binaries and the corresponding ternary have been measured at 298.15 K by using a continuous dilution dilatometer made in our laboratory. The experhnental data of the three binaries are in good agreement with those reported in the literatures. A local composition model is used to correlate the experimantal data. With the three pairs of nonrandom parameters of those binaries, the predicted excess volumes of the corresponding ternary are consistent with the experimental results.