What is the boiling range of this mixture? Figure 2-3 Temperature-composition diagram for ethanol-water From Separation Process Engineering, Third Edition by Phillip C. What is its dew point? What is the composition of the first drop? boiling range bubble point ењЋ,initial yE,initial 3. Consider a superheated binary vapor that is 40 mol% ethanol. What is its bubble point? What is the composition of the first bubble? dew point 2. Consider a sub-cooled binary liquid that is 40 mol% ethanol.

Pure liquids have a boiling point mixtures have a boiling range, delimited by their bubble point and dew point. Wankat (ISBN: ) Copyright В© 2012 Pearson Education, Inc. Figure 2-3 Temperature-composition diagram for ethanol-water From Separation Process Engineering, Third Edition by Phillip C.A subcooled liquid feed of composition zA, heated to temperature TA, will separate spontaneously into 2 phases, of composition xA and yA Lecture 2 ends in the middle of this slide zA.yA superheated vapor subcooled liquid 2-phase region saturated vapor line saturated liquid line TA xA How big should the drum be? What height should the nozzle be? What T and P should the drum be? What T and P should the feed be?Д¬onsider a binary (i.e., 2-component) system with 2-phases: What do we know? yA + yB = 1 xA + xB = 1 yA в‰ xA Tvap, Pvap yA, yB Tliq, Pliq xA, xB At equilibrium: Tvap = Tliq Pvap = Pliq GibbsвЂ™ Phase Rule: degrees of freedom = # components (C) - # phases (P) + 2 For a binary, 2-phase system: 2 вЂ“ = 2 We can specify only 2 intensive variables (all others are fixed, by VLE)ДЈ Specify P and T 2 graphs in one: T vs.

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