Why is this different than that determined from the y vs. x,y plots for ethanol-water? The azeotrope for ethanol-water is indicated as T = 77.65 o C and a concentration of 0.955. Why? Why are the boiling point temperatures of the pure components different than those determined from the y vs. An azeotrope is indicated by the composition at which the isotherm becomes vertical. Points between the saturated liquid line and the saturated vapor line represent a two-phase, liquid-vapor system. Temperature is represented by isothermal tie lines between the saturated liquid (boiling) line and the saturated vapor (dew) line. Composition – Ponchon-Savarit Plot 3 phases are shown on the plot – solid, liquid, and vapor. Composition – Ponchon-Savarit PlotĮnthalpy vs. composition plot to obtain this information. We will also need to employ energy balances, based on enthalpy, for certain separation problems. Composition – Ponchon-Savarit Plot We have begun to employ mass balances, both total and component.
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