Densities for mixtures containing sunflower seed oil with pentane, hexane, heptane, and octane have been determined at various temperatures between 298.15 K and 313.15 K using a vibrating tube densimeter. The derived excess volumes have been correlated by the Redlich−Kister equation. All the systems showed negative deviations from ideality. The excess volumes increased with an increase in temperature.

Excess molar volume data for mixtures containing hexane with three edible oils: olive, corn, and pip of grape have been determined from density measurements at various temperatures between 298.15 and 313.15 K using a vibrating tube densimeter. Results have been correlated by the Redlich-Kister equation. Systems showed negative deviations from ideality in the whole composition range.

Vapor−liquid equilibrium at 101.3 kPa has been determined for the binary systems of acetone + 3-pentanone and isopropyl ether + 3-pentanone. The two systems exhibit positive deviations from ideal behavior. The activity coefficients were correlated by the Wilson equation. The results are thermodynamically consistent according to the method of Van Ness. Neither system shows an azeotrope.