CBE 102B Problem Set 7 Due: Wednesday, May 26, 2010
1. (30 pts.) Consider a liquid solution of water (A) and methanol (B) at T=25C and
atmospheric pressure. The following data are available for the mean molar volume
V m3 / mole) of the solution as a lncti
CBE 102B Problem Set 8 [ABET] Due: Friday, June 4, 2010
1. (14 pts.) One mole of liquid benzene is mixed with two moles of liquid toluene. At 20 0C,
the vapor pressures of benzene and toluene are 51.3 and 18.5 kPa, respectively. As the pressure
is reduc
CBE 102B Problem Set 5 Due: Friday, May 7 2010
1. (15 pts.) A system contains C, C0, C02, H2, and H20 in chemical equilibrium. Find the
number of independent reactions, R, and suggest stoichiometric coefficients vj.
2. (15 pts.) According to the Debye t
CBE 102B Problem Set 1 [ABET] Due: Friday, April 9, 2010
W
1. (40 pts.) Consider a uid that obeys the van der Waals equation of state
RT 1
Vin b VIII-1
where V is the molar volume. For this uid, U
m m 9
the following form
Usz (V T)=U<)(T)+(V,T)
m m 3 m
CBE 102B Problem Set 3 Due: Friday, April 23, 2010
1. (15 pts.) A function f = f (x, y) is concave when the eigenvalues 21 and 32 of the matrix
of 2nd derivatives are both negative. Use this result to Show that the necessary and sufcient
conditions for
CBE 102B Problem Set 6 [ABET] Due: Wednesday, May 19, 2010
For a uid that obeys the van der Waals equation of state
RT 1
_a 7
V b V;
m
p:
7
we found the following expressions for the functions Um , H m , Sm , Am, and ,u = Gm
l
Um (VmaT)=Ufn(T) 7
CBE 1028 Problem Set 2 Due: Friday, April 16, 2010
1. (12 pts.) [ABET] Consider a uid that obeys the van der Waals equation of state
* RT _a1
p Vnb V
where Vm is the molar volume. For this uid, Am, Jm, G
m, and Ym can be expressed in the
following f
CBE 102B Problem Set 4 [ABET] Due: Friday, April 30, 2010
1. (20 pts.) Consider the ideal gas reaction: H2(g) + C02(g) at) CO(g) + HZO(g). At
1000 K= a measurement gives the following values for the partial pressures:
p(H2) = 0.55bar , p(COz) 2 0.20bar ,
Notes
Entropy
Introductory Notes
Vctor R. Vsquez
Chemical Engineering Deparment
Spring Semester
Outline
Notes
1. Typical Engineering Problems
2. Entropy Basic Ideas and Evidence
3. Engineering Need and Evidence
4. Engineering Formulation
5. The Entropy Ba
Evacuating a liquid from a tank with a pressurized vapor
Solving the Problem
Common Student Questions and Comments
1.1
v.v
as
qu
ez
1 Moving Liquids
Evacuating a liquid from a tank with a pressurized vapor
There are many ways to move fluids in chemical pr
CHE495: Two Laws, One Class
Assignment #7
Due: 5 PM, November 15, 2016
Problem 1
(30 Points)
Steam tables are wonderful constructs. Not only are they useful for energy balances, but we can relate them
to phase equilibria using the concept of the fugacity.
CHE495: Two Laws, One Class
Assignment #1
Due: 5 PM, September 19, 2016
Problem 1
(25 Points)
While solving the exercise involving R-134a in class, we required the use of reference data several times
to make progress toward the solution. In some cases, de
CHE495: Two Laws, One Class
Assignment #2
Due: 5 PM, September 26, 2016
The last homework set was based around mainly closed-type systems, such that flow terms were non-existent
at the system boundaries. In this set, youll find the application of the Firs
CHE495: Two Laws, One Class
Assignment #4
Due: 1 PM, October 14, 2016
Choose your adventure:
Complete HW04 and turn it in during class next week. Only counts toward homework scores.
Finish all the problems and hand in your solutions by 5 PM on Monday, O
CHE495: Two Laws, One Class
Assignment #3
Due: 1 PM, September 30, 2016
Problem 1
(25 Points)
An ice cube is dropped into a hot cup of coffee. As the ice cube melts, the coffee cools down. What
happens to the entropy of the coffee, the entropy of the ice
CHE495: Two Laws, One Class
Assignment #5
Due: 1 PM, October 21, 2016
Problem 1
(25 Points)
Derive an expression for calculating internal energy changes with dependent variables T and P (i.e., U (T, P ).
(A) Simplify this expression assuming we are using
CHE495: Two Laws, One Class
Assignment #6
Due: 5 PM, October 31, 2016
Problem 1
(25 Points)
For a rubber band, we can write the fundamental relation for internal energy as
dU = T dS F dL,
where F , the system force, is negative when the rubber band is und
ChE 440 / 640
Homework assignment #13 is due Wednesday, November 23, 2016
For full credit, be sure to follow the prescribed format given in the homework format
requirements, as described on WebCampus.
This assignment must be turned in at the beginning o
Homework 2
Chemical Engineering 101A: Momentum Transfer
Fall 2016
Due: October 12, 2016
1. Water at a temperature of 25C is flowing down a wide inclined plane at an angle of 35from
the horizontal. The velocity of the fluid at the air boundary of the fluid
Math 33A Practice Exam 1
Problem 1. Find all solutions (if they exist) to the system of linear equations
2x + 8y + 4z = 2
2x + 5y + z = 5
4x + 10y z = 1
Problem 2. Consider the system of linear equations
x + 2y + 3z = 4
x + ky + 4z = 6
x + 2y + (k + 2)z =
CH ENGR 101C: Spring 2016
HW8 Solution
Problem 1 solution:
Solution to #1:
a) Osmotic pressure of the feed: F=iCFRT, assuming T = 298K
= (3) (500 mg/L)*(1g/1000mg)/(40.08 g/mol)(8.314 L*kPa/(K*mol)(298K) = 92.678 kPA
b) Rw = 0.70, Rs=0.97
Concentration Fa
Spring 2016
CHE 101C: Mass Transfer
Homework Problem Set #7:
Problem 1
Oxygen diffuses from the atmosphere into a flowing river in which the flow is turbulent. It is
suggested that the resistance to mass transfer in the liquid phase is primarily due to a
CH ENGR 101C: Spring 2016
HW#2 Solution
Problem 1
Page 1 of 12
Problem 1
Page 2 of 12
Problem 2
Page 4 of 12
Problem 2
Page 5 of 12
Problem 3
Page 6 of 12
Problem 3
Page 7 of 12
Problem 3
Page 8 of 12
Problem 4
Page 9 of 12
Problem 4
Page 10 of 12
Problem
CH ENGR 101C Spring 2016 Quiz#6
1. When calculating the mass flux from particles
in a packed bed to a flowing fluid phase (through
the bed), the proper driving force is the difference
between the inlet concentration to the packed bed
and the concentration
CH ENGR 101C: Spring 2016
HW#1 Solution
1. Provide the criteria for volume averaging in continuum approach. Explain in one short
sentence.
Volume averaging is necessary to represent the fluid property to avoid the complexity of
tracking each individual mo
ChE 101C Quiz 7
May 13, 2016
_ 1. In Reverse Osmosis Process, concentration of solute on the membrane surface is always
higher than the concentration of bulk (feed) flow.
A) True
B) False
_ 2.Which of the following parameters is always equal to zero, in t