(Solution) - N Heplane 1 and water 2 are essentially immiscible as liquids A -(2025 Original AI-Free Solution)

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n-Heplane (1) and water(2) are essentially immiscible as liquids. A vapor mixture containing 65-mol-% water at 100°C and 101.33 kPa is cooled slowly at constant pressure until condensation is complete. Construct a plot for the process showing temperature vs. the equilibrium mole fraction of heptane in the residual vapor, App. B, for vapor-pressure equations.