(a) What is the % composition of the vapor in equilibrium with a boiling liquid that has...
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(a) What is the % composition of the vapor in equilibrium with a boiling liquid that has a composition of 30% benzene and 70% toluene.
b). If a sample of vapor is found to have a composition of equal parts benzene and toluene, what is the composition of the boiling liquid that produced this vapor?
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Post-Lab Questions 1. Refer to MtC Figure 3-17 to answer the following questions. Note that each vertical line in the graph grid equals 5%, and the scale runs both ways for benzene and toluene: 100% benzene → 0% benzene 0% toluene → 100% toluene a. What is the % composition of the vapor in equilibrium with a boiling liquid that has a composition of 30% benzene and 70% toluene? b. If a sample of vapor is found to have a composition of equal parts benzene and toluene, what is the composition of the boiling liquid that produced this vapor? Fractional Distillation As shown in Figure 3-14, the composition of the liquid phase is not the same a the composition of the vapor phase if distilling two miscible liquids. If a 50/5 than toluene. Therefore, the initial distillate will be richer in benzene than in tolu mixture of benzene/toluene is heated to reflux, the vapor contains more benzene ene. The relationship between the composition of the liquid phase and the ga phase is represented by a temperature/composition diagram as shown in Figure 3-17, which roughly represents the case for benzene and toluene. Temperature (°C) 110 D E 100% benzene B vapor (gas) A 0.5 liquid Mole fraction of toluene 100% toluene Figure 3-17. Temperature/composition diagram for fractional distillation. When a 50/50 benzene/toluene mixture (A) is heated, the vapor phase will b gher concentration of benzene, because it is the lower boiling fraction. This is presented by point B, which upon condensation leads to point C. C has a much e first fraction that condenses in a simple distillation, and corresponds t ate distillation. However, if solution C is re-vaporized, the vapor obtained cor sponds to point D. Upon condensation, point D gives liquid E, which is richer to a one benzene than C. If this pron e Duro 1 and result will Post-Lab Questions 1. Refer to MtC Figure 3-17 to answer the following questions. Note that each vertical line in the graph grid equals 5%, and the scale runs both ways for benzene and toluene: 100% benzene → 0% benzene 0% toluene → 100% toluene a. What is the % composition of the vapor in equilibrium with a boiling liquid that has a composition of 30% benzene and 70% toluene? b. If a sample of vapor is found to have a composition of equal parts benzene and toluene, what is the composition of the boiling liquid that produced this vapor? Fractional Distillation As shown in Figure 3-14, the composition of the liquid phase is not the same a the composition of the vapor phase if distilling two miscible liquids. If a 50/5 than toluene. Therefore, the initial distillate will be richer in benzene than in tolu mixture of benzene/toluene is heated to reflux, the vapor contains more benzene ene. The relationship between the composition of the liquid phase and the ga phase is represented by a temperature/composition diagram as shown in Figure 3-17, which roughly represents the case for benzene and toluene. Temperature (°C) 110 D E 100% benzene B vapor (gas) A 0.5 liquid Mole fraction of toluene 100% toluene Figure 3-17. Temperature/composition diagram for fractional distillation. When a 50/50 benzene/toluene mixture (A) is heated, the vapor phase will b gher concentration of benzene, because it is the lower boiling fraction. This is presented by point B, which upon condensation leads to point C. C has a much e first fraction that condenses in a simple distillation, and corresponds t ate distillation. However, if solution C is re-vaporized, the vapor obtained cor sponds to point D. Upon condensation, point D gives liquid E, which is richer to a one benzene than C. If this pron e Duro 1 and result will
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Solution a 65 Benzene and 35 Toluene Go up wards from the point of 30 Benz... View the full answer
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