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Quiz 2, Sp 07

# Quiz 2, Sp 07 - ChE2114 Second Quiz February 1 2007 g=9.81...

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Unformatted text preview: ChE2114 Second Quiz February 1, 2007 g=9.81 111/52 1. (25 points) A mixture of benzene (S.G. = 0.879) and n—hexane (3.6. = 0.659) is 75.0 mass % benzene. Assuming additivigg of volumes, what is the density (in units of glen-13) of the mixture? ._- ' f VTD +cdir — V5 + V H ”VI-rout? ~— MB + M“ f H f5 (3” 65M: IEW%W HLzL— +Qi :.:.[_2__3 0.379 O.é5"i f’ {Sr—omit? (25 points) A differential manometer is connected at two points to a line through which water is ﬂowing. The manometer ﬂuid is a liquid with a density of 3.30 g/cm3. If h = 45.0 centimeters on the manometer, what is the pressure drop between point a and point b (in Pascals)? AP = ﬁ£<fﬁ~thxo) : as; (o,+so)(5.3o—I.oo>loj :- I.oz.><1o“‘Fa_,. DJ (25 points) The feed rate to a distillation column is 200 111015 per minute, and the feed composition is 60.0 mol % A and 40.0 mol % B. The bottoms product from the column is pure B, and the overhead product is 80.0 mol % A. What is the ﬂow rate of B (in 111013 per minute) in the bottoms product? (bum-W edema/C 800970 3de 2-0-0?0 B 100 (0,90) .: glam Wm... 12 2%.?) s 30%? lacunae) ~50 : 50.0 ——~——+’””"i L5. (FM/wot his (25 points) The feed Stream to a drier is 20.0 mass % solids and 80.0% water, and the flow rate of this stream is 500 kg per hour. Two streams leave the drier; one is pure water vapor and the other is a partially dried product that centains mostly solids and a small amount of water. We want to calculate the percentage of the water in the feed that is evaporated. For the system as speciﬁed, how many degrees of freedom are there? ...
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