Hexane and perfluorohexane show partial miscibility below 22.70C. The critical
Chapter 6, Problem 6.17(a)(choose chapter or problem)
Hexane and perfluorohexane show partial miscibility below \(22.70^{\circ} \mathrm{C}\). The critical concentration at the upper critical temperature is x=0.355, where x is the mole fraction of \(\mathrm{C}_6 \mathrm{~F}_{14}\). At \(22.0^{\circ} \mathrm{C}\) the two solutions in equilibrium have x=0.24 and x=0.48, respectively, and at \(21.5^{\circ} \mathrm{C}\) the mole fractions are 0.22 and 0.51. Sketch the phase diagram. Describe the phase changes that occur when perfluorohexane is added to a fixed amount of hexane at (a) \(23^{\circ} \mathrm{C}\), (b) \(22^{\circ} \mathrm{C}\).
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