600) 600 500) Dewline, /kg/sq. cm. 500 Auriliary Line for Interpoloting Equilibrium Compositions 400 400 Enthalpy, K COU Kg. 300| 300 97 ONE 959 7765cd 90 88 94 200 859 84 83 82 79.5 79 80.5 llavine 80C. 200 100 100% 80 Asdotropic Composition 100 Boiling Ling IK/sqcm. Wajar OC 40 20 Liquid Jo Freezing Line -20 Solid -100 01 0.2 04 0.5 0.6 0.7 0.8 0.9 -100 0 0.3 HD Concentration of Alcohol, Weight Fraction GHOH Enthalpy-composition diagram for ethanol-water at a pressure of 1 kg/cm. 5. Using the hx diagram, find the latent heat of vaporization (in kcal/kg) for: a) Pure water. (2 points) b) Pure ethanol. (2 points) c) The ethanol-water mixture at the top of the column. (8 points)