VAPOR-LIQUID-EQUILIBRIA AND EXCESS-ENTHALPIES FOR OCTANE PLUS N-METHYLACETAMIDE, CYCLOOCTANE PLUS N-METHYLACETAMIDE, AND OCTANE PLUS ACETIC-ANHYDRIDE AT 125 DEGREES-C

Isothermal P-x data and excess enthalpies have been measured at approx imately 125 degrees C for the binary mixtures of octane + N-methylacet amide, cyclooctane + N-methylacetamide, and octane + acetic anhydride. For each binary system linear temperature dependent interaction param eters were fitted to experimental data using the NRTL model. Activity coefficients at infinite dilution were derived from the P-x data at lo w concentrations using a flexible Legendre polynomial.