Chemical Engineering 150B
Problem Set 1
Due Friday September 4, 2015
Problem 1. (15 points) Discuss what is required to be true for the molar-averaged and massaveraged velocities to be identical. Be specific and relate to physical properties. Be sure to
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ChE 150B
Problem Set 8
Due October 23, 2015
Problem 1. For a binary mixture of components 1 and 2, show that the equilibrium phase
compositions and amounts can be computed directly from the following reduced forms of
Eqs. (5), (6) and (3) of Table 4.4.
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SSID
By signing my name below, I afﬁrm that I have not received assistance in completing this
examination paper nor have I given assistance to another student.
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Chemical Engineering 150B
Midterm Exam 2
November 15th, 2013
8:10

Problem 1 (20 points) Please provide short answers (2 point each unless otherwise speciﬁed).
In the graph below, the operating and equilibrium lines are shown for a separation involving
contact between a gas and a liquid in a series of equilibrium stages.

ChE 150B
Problem Set 11
Due November 20, 2015
Problem 1. 100 kmols/h of a mixture containing n-butane (30 mol %), n-pentane (40 mol
%) and n-hexane (30%) at 148oC and 17.5 atm is flashed adiabatically to 7 atm. Find the
final temperature and the vapor/liq

ChE 150B
Problem Set 13
Due November 30, 2015
Problem 1. The feed to a distillation tower is given in the table below. The feed rate is set
to 100.0 kmol/hr, and the column operates at 300.0 psig. Design a column where the mole
fraction of propane in the

ChE 150B
Problem Set 10
Due November 16, 2015
Required reading for this problem set: Seader & Henley section 9.1. It is assumed that
you will have read this material prior to asking questions about this assignment.
For the multicomponent distillation prob

By signing my name below, I affirm that I have not received assistance in completing this
examination paper nor have I given assistance to another student.
Name (print):_
Name (sign):_
Chemical Engineering 150B
Midterm Exam 2
November 7th, 2012
8:10 9:00

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Chemical and Biomolecular Engineering 150B
Problem Set 5
Due Friday, October 2, 2015
1. An absorption tower, operating at 20 C and 1 atm, is used to absorb sulfur dioxide from an air
mixture into water. At one point in the absorber, the partial pressure o

Chemical and Biomolecular Engineering 150B
Problem Set 3
Due Friday, September 18, 2013
1. Dilute concentrations of toxic organic solutes in aqueous solution can be degraded by a
biofilm bound to an inert, nonporous solid surface. A toxic organic solute (

Chemical Engineering 150B
Problem Set 2
Due Friday, September 11, 2015
Problem 1. (15 points) The liquid phase diffusivity of carbon tetrachloride (CCl 4) in
methanol was reported by Reid, Prausnitz, and Sherwood to be 1.7 x 10-9 m2/s at 288 K.
(a)
Use th

Chemical Engineering 150B
Problem Set 6
Due Monday Oct. 12, 2013
This problem is not graded, but provides useful practice for evaluating the properties of humid air.
Solutions will be posted on bSpace: A dryer operates with air entering at 105 F and 1 atm

Chemical Engineering 150B
Problem Set 7
Due Friday October 16, 2015
This homework involves many calculations most easily computed using programs like Excel,
Matlab, or Mathematica. Please provide a clear description of all equations and steps taken to
sol

ChE 150B
Problem Set 9
Due October 30, 2015
Problem 1. An absorption column for laboratory use has been carefully constructed so that it has
exactly 4 equilibrium stages and is being used to measure equilibrium data. Water is used as the
solvent to absorb

ChE 150B
Problem Set 10
Due November 9, 2015
Problem 1. You are being asked to design a distillation column to separate a feed
containing 65 lbmol/h benzene and 70 lbmol/h ethylbenzene. It is necessary to separate
the mixture such that a product stream le

Chemical Engineering 150B
Problem Set 2
Due Friday, September 11, 2015
Problem 1. (15 points) The liquid phase diffusivity of carbon tetrachloride (CCl 4) in
methanol was reported by Reid, Prausnitz, and Sherwood to be 1.7 x 10-9 m2/s at 288 K.
(a)
Use th

Chapter 24: Fundamentals of Mass Transfer
1. 24.1 Molecular Mass Transfer
a. Molecular diffusion transport of mass to eliminate inequalities throughout system
b. Velocities
i. Must average velocities of each species present to evaluate mixture velocity
c.

CBE 150B Midterm 1 Study Guide
General solution
1.
2.
3.
4.
5.
6.
Draw a picture of system
Identify boundary conditions
Make list of assumptions
Define the coordinate system
Write differential mass balance, boundary conditions, and initial conditions
Solv

Chapter 24: Fundamentals of Mass Transfer
Density of a mixture
n
o
= i for n species
i =1
Mass fraction
A A
=
i
o
A =
o
i =1
(24-2)
(24-3)
A
MA
c A=
(24-4)
Gas Case Molecular Concentration
o
for a species A
Molecular Concentration
o
(24-1)
c A=
nA P A