Some thermophysical properties for quaternary systems of n.m.morpholine, with alkanes and alcohols at four temperatures

This research reports measurement the densities ρ, and refractive indices, , for the systems of (N.M. Morpholine + n-nanone + n-octane + n-heptane) and (N.M. Morpoline + 1-nanonal + 1-octanol + n-heptane) over the rang of temperatures (293.15k – 323.15k). From experimental data of densities, and refractive indices, the excess molar volumes, , and excess refractive indices , were calculated for quaternary systems. The excess function results for these systems were observed rocking between positive and negative deviation from ideality depending on molecular interaction in these system. The Flory theory has been extended for the theoretical prediction of excess molar volumes of quaternary systems studied here depending on the pure component liquid parameters. The theory predicted the volumetric behavior and magnitudes of, , well. Refractive indices for quaternary system studied in this work can be predicted by using different refractive indices mixing rules, found good agreement between the experimental and predicted values of the refractive indices for the quaternary system studied here.