CRITICAL PROPERTIES OF THE VAPOR-LIQUID-EQUILIBRIA OF THE BINARY-SYSTEM ACETONE NORMAL-PENTANE

The P-V-T-x properties for the acetone-n-pentane azeotrope-forming system have been measured by the technique developed by Kay. The experimental uncertainties have been estimated at 0. 05 K, 2. 4 kPa and 0. 06% of the volume. The results for eight different compositions covering the range 180 to 200 degree C and 2. 5 to 4. 0 MPa are given. Smoothed critical loci have been plotted. The critical temperatures and pressures were correlated by a quadratic relationship of the form Q//c//m equals SIGMA //i SIGMA //jx//ix//jQ//c//i//j where i, j equals 1. 2. The maximum discrepancy in the critical temperature was 0. 6 K and in the critical pressure was 0. 012 MPa.