ChE 443, Fall 2011
Exam I
Open Book, Open Notes, Closed Neighbors, 4 Questions for 100 Points
1. (25 points) Gas diuses through two immiscible liquids contained in a capillary tube
as shown in the gure. The concentration of the gas at the bottom of the ca
ChE 443, Fall 2012
Exam I
Open Book, Open Notes, Closed Neighbors, 4 Questions for 100 Points
1. (30 points) Consider a tank of diameter 2 meters and a height of 5 meters containing
an organic solvent at the bottom, of an initial height 0.2 meters. There
ChE 443
Fall 2012
ChE 443, Fall 2012, Exam IA, Closed EVERYTHING, Open Minds
Answer any four questions. I will grade them all and take the highest grade. Be clean, clear,
precise.
1.
d
dr
1 d(rv )
r dr
=0
( Equation of Motion)
Integrate the equation ? sub
ChE 443, Fall 2011
Exam II
Open Book, Open Notes, Closed Neighbors, 3 Questions for 90 Points
1. (30 points) The series of questions are based on the phase diagram.
1. Consider a mixture that has 90 % of the less volatile component. What is the dew point
ChE 443, Fall 2012
Exam II
Open Book, Open Notes, Closed Neighbors, 3 Questions for 100 Points
1. (40 points) A volatile organic compound (VOC) in air is being absorbed by water in a packed tower with
a cross sectional area of 0.186 m2 . The tower conditi
ChE 443, Fall 2011
Exam III
Open Book, Open Notes, Closed Neighbors, 3 Questions for 100 Points
The phase diagrams are printed separately, one per page
1. (30 points) 100 moles/hour of a binary mixture of 60 mole % benzene and rest toluene are to be separ
ChE 443, Fall 2011
Final Exam
Open Book, Open Notes, Closed Neighbors, 5 Questions for 100 Points
The phase diagrams are printed separately, one per page
1. (20 points) Answer the following questions based on the phase diagram
Calculate the activity coec
ChE 443, Fall 2011
Preliminary Exam
Closed Book, Closed Notes, Closed Neighbors, 10 Questions for 0 Points
1. At a pressure of 50 psia, water boils at 281 o F . Convert this temperature to: (a)
o
R (b) K and (c)
o
C
2. A pressure gauge on a vessel reads 2
ChE 443 - Fall 2012
Preliminary Exam A
Each question 10 points each
1. Consider a binary mixture containing 90 mole percent methane (CH4 ) and 10 mole
percent ethane (C2 H6 ). Atomic weight of carbon is 12, hydrogen is 1.0. How many
grams of methane would