A fractionation tower operating at 101.3 kPa produces a distillate of 95 mol % acetone (A), 5 mol % water, and a residue containing 1 mol% A. The feed liquid is at 125C and 687 kPa and contains 57 mol % A. Before entering the tower, the feed passes through an expansion valve causing it to be partially vaporized at 60C. From the data below, determine the molar ratio of liquid to vapor in the feed. All data except K-values, are temperature-independent. Take "1 kmol/s" as basis of the feed rate. EQUILIBRIUM DATA FOR ACETONE-HO AT 101.3 kPa 56.7 57.1 60.0 61.0 63.0 71.7 100 92.0 50.0 33.0 17.6 6.8 0 94.4 85.0 83.7 80.5 69.2 0 T, C Mol% A in liquid: 100 Mol% A in vapor: 100