We noted in Figure 14-17 that the liquid and vapor curves taken together outline a lens-shaped region when the normal boiling points of benzene-toluene solutions are plotted as a function of mole fraction of benzene. That is, unlike Figure 14-16, the liquid curve is not a straight line. Use data from Figure 14-17 and show by calculation that this should be the case.

Figure 14-17

Figure 14-16

Transcribed Image Text:

Normal boiling point, °C 110 105 100 Liquid 95 90 85 T 80 Toluene Vapor Stage 1 Stage 2 0.200 0.400 0.600 0.800 Mole fraction of benzene (Xbenz) Benzene