EXCESS MOLAR VOLUMES AND REFRACTIVE-INDEXES OF CIS-9-OCTADECENOIC ACID PLUS N-ALKANES OR ALKAN-1-OLS AT 298.15-K

The excess molar volumes V(m)E and refractive indices n(D) of cis-9-oc tadecenoic (oleic) acid + a n-alkane (C-7-C-12) or + an alkan-1-ol (C6 -C-12) have been determined at 298.15 K for all mixtures. The excess v olumes are negative over the whole composition range. A linear depende nce between V(m)E at the minimum and the number of carbon atoms, N(C), and between V(m)E(x=0.5) and the volume fraction, phi1, of the second component is found. Molar refractions have been derived from refracti ve indices and densities using the Lorenz-Lorentz equation.