Ethylene glycol and water are flash distilled in a cascade of three drums connected as shown in

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Ethylene glycol and water are flash distilled in a cascade of three drums connected as shown in the figure. All drums operate at 228 mm Hg. Feed is 40 mol% water. One-third of the feed is vaporized in the first drum, two-thirds of the feed to the second drum is vaporized, and one-half the feed to the third drum is vaporized. What are the compositions of streams L3 and V3? Note that water is the more volatile component.

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