Homework # 8
Due: Friday, November 5, beginning of class.
06-323 Heat and Mass Transfer
1. An Arnold cell is partially filled with liquid toluene at 298K and atmospheric pressure. The
cell has a cross sectional area of 0.8 cm2, a liquid depth of 3 cm, and

Feedback Form #4 06-323 Heat (3: Mass Transfer Fall 2014
NAME
If you get both problems right, you get 5 points.
If you get one problem right, you get 4 points.
Please write legibly. If I cannot decipher your handwriting, you will only get 3 points.
1. F

Homework #6
06-323 Heat & Mass Transfer
Due: Friday October 5th, beginning of class
1. The heat transfer coefficient of air flowing over an object can be determined by observing
the temperature history as a function of time of the object. Consider a spher

Homework #1
Due: Friday, August 31, beginning of class
06-323 Heat and Mass Transfer
Math
1. Rewrite the following vector equations as systems of differential equations:
1a)
(in Cartesian coordinates; where k and A are constant)
1b)
(in cylindrical coordi

Homework #11
06-323 Heat & Mass Transfer
Due: Friday November 16th, beginning of class
1. A latex balloon is filled with 100% helium and is under 2.5 atm of pressure. The wall of the
balloon is 1 mm thick with a surface area of 0.5 m2 and you can neglect

Homework #10
06-323 Heat & Mass Transfer
Due: Friday November 9th, beginning of class
1. A steady-state Arnold diffusion cell is used to determine the diffusion coefficient of
methanol in air at T = 298K and P = 1.013 x 105 Pa. The cell has a 0.80 cm2 cro

Homework #9
06-323 Heat & Mass Transfer
Due: Friday November 2nd, beginning of class
1. A binary mixture of methane and hydrogen gas is contained in a tube at 101.32 kPa and 273
K. The tube connects two large, well-mixed gas reservoirs of A and B. At one

Homework #8
06-323 Heat & Mass Transfer
Due: Friday October 26th, beginning of class
1. A truck travels at 25 mph through air at 70F. The oil pan of the engine extends below the
front end of the cab. The bottom of the oil pan is essentially a flat plate t

Homework #7
06-323 Heat & Mass Transfer
Due: Friday October 12th, beginning of class
1. A water main is buried in soil initially at 22C when the surface is suddenly subjected to a
constant temperature of -10C for 60 days.
1a) Calculate and plot the temper

06-323 Final Exam 2011
Name:_
1. Multiple choice (21 points total; 3 per question)
Please circle the correct answers on this sheet. Make sure your name is on this
sheet. There is only one correct choice per question.
2.1
/8 Scoring
1.1
Over the temperatur

Chem. Eng. 06-323 Heat & Mass Transfer
Fall 2012 Exam II
Name:_
1. Qualitative multiple choice (15 points total; 3 points per question)
Please circle ONE correct answer per question on this sheet.
1.1
For gases, DAB is NOT dependent on:
a) pressure
c) con

Homework #2
Due: Friday, September 7, beginning of class
06-323 Heat and Mass Transfer
1. In lecture on August 29, we found an expression for the thermal conductivity of a dilute,
monatomic gas. Using this expression:
1a. Plot the k values for both hydrog

Feedback Form #3
06-323 Heat & Mass Transfer
Fall 2014
NAME_
If you attempt all 4, you will receive 3 point.
If you attempt them all, and get two correct, you will receive 4 points.
If you attempt them all, and get 3 or more correct, you will receive all

Feedback Form #2
06-323 Heat & Mass Transfer
Fall 2014
NAME_
Match the lettered equations on the left with the correct definitions on the right:
If you attempt all, you will receive 3 points.
If you get one to four correct, you will receive 4 points.
If y

Quiz #5
06-323 Heat & Mass Transfer
Fall 2012
November12th, 2012
NAME_
1. Match the lettered equations on the left with the correct definitions on the right:
A.
B.
C.
D.
E.
F.
G.
H.
=
=
=
=
(2 1 ),
(2 1 )
=
+
16
(1 2 )
(2 1 )
(Mw )
1
2
1
)3

Quiz #4
06-323 Heat & Mass Transfer
Fall 2012
October 29th, 2012
NAME_
Please write legibly. If I cannot decipher your handwriting, you will lose the point.
1. For a gas i, relate partial pressure (pi) to concentration (ci) to density (i) to molecular
wei

Quiz #3
06-323 Heat & Mass Transfer
Fall 2012
October 8, 2012
NAME_
1. A sphere at To is suddenly immersed in a fluid at T (To > T), sketch temperature as a
function of r for (a) Bi = 0.002, (b) Bi = 5, and (c) Bi = 35, starting at r = 0 (center of the
sp

Homework #13
06-323 Heat and Mass Transfer
Due: Friday, December 7, by the beginning of class
1. In lecture we worked out the rate of mass transfer of a gas diffusing into a falling laminar
film. Show that the result of that calculation can be used to obt