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Unformatted text preview: Wednesday Oct 28 Exam next Thursday, Nov 4 Questions? Reading Quiz Questions? a ij Figure 10.5 (P vs. T plot) Bubble pressure iteration Reading quiz questions a = molecular interaction (Think of a 12 as how much component 1 prefer to be near component 2) As strength of molecular interaction , a . Immiscible negligible interaction between A and B (i.e., A prefers to be with A, B prefers to be with B) a 12 is insignificant. a 12 =(a 11 a 22 ) 0.5 (1k 12 ) k 12 , a 12 k 12 = 0 for ideal solutions When k ij increases for fixed liquid phase and fixed temperature, what happens to equilibrium pressure? A. Increases B. Decreases C. Does not change much. Recall: a ij =(a ii a jj ) 0.5 (1k ij ) a ij =(a ii a jj ) 0.5 (1k ij ) As k ij , a ij , so the interactions between molecules i and j are weakened, so molecules are further apart, so pressure (option A) Constant temperature slice gives Pxy plot Pressure x A , y A P Px Py Constant pressure slice gives Txy plot Constant composition slice gives PT plot Pressure Temperature Bubble Pressure Calculation...
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 Fall '10
 FALCONER,J

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