2. 100 mol/hr of an ethanol/H₂O mixture containing 10 mol% ethanol is to be produced as theliquid outlet stream from an isothermal (T-78.15°C) flash unit. The feed stream is 30 mol%ethanol.At 78.15°C the liquid mixture of ethanol(1)/water(2) is adequately described by the following vanLaar equations for the activity coefficients:In Y₁ = A12A21x2(A₁A12X1 + A21x2.A12X1In y2 = A21 A₁2x₁ + A₂1x24A12X122A12 = 1.6798A21 = 0.9227Assume that the vapor phase behaves as an ideal gas and that the fugacities of pure ethanol andwater are independent of pressure (i.e., that it is appropriate to use modified Raoult's law). At 78.15°C the saturation pressure ofpure water is 329 mm Hg.Determine:(i)(ii)(iii)pure ethanol is 755 mm Hg and the saturation pressure ofthe outlet pressure at which the flash must be operated.the composition of the vapor stream.the flow rates of the feed and vapor streams.

There is balance between the streams of vapor and liquid emerging from the flash unit.The problem's…

At 78.15°C the saturation pressure of pure ethanol is 755 mm Hg and the saturation pressure of pure water is 329 mm Hg. Determine: (i) (ii) (iii) the outlet pressure at which the flash must be operated. the composition of the vapor stream. the flow rates of the feed and vapor streams.

At 78.15°C the saturation pressure of pure ethanol is 755 mm Hg and the saturation pressure of pure water is 329 mm Hg. Determine: (i) (ii) (iii) the outlet pressure at which the flash must be operated. the composition of the vapor stream. the flow rates of the feed and vapor streams.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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