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ChBE 3110A Exam 1 September 21, 2009
1. 50 points
A mixture of 18 mol% n~heptane and the rest nhexane at temperature of 80°C is
brought to a pressure P where it exists as a vapor/liquid mixture at equilibri
ChBE 3110A
Test 2
Fall 2011
Name:_
Show all work, list all assumptions, and place a box around your final answers. You may
use the provided equation sheet and a calculator. Use of book or notes is not allowed.
(1)
(10 pts) An experiment is devised for mea
(1)
A vessel contains a vapor mixture of ethanol (1) with hexane (2) at T = 150 C. As the
pressure is increased, liquid drops begin to form at P = 9 atm. What is the composition of the
vapor? The vapor pressures and virial coefficients at 150 C are given
(1) A binary gas mixture at composition y1 is cooled from a high temperature (T) until
two liquid phases suddenly form in equilibrium with the vapor. The experiment was
carried out at a constant pressure of 1.2 atm. At this three-phase point T is held con
ChBE 3110A Thermodynamics II
Test I
Fall Semester 2012
Dr. Meredith, Instructor
Name:_
Each question is equally weighted in the final score.
Please show all work for full credit. Box your final answers.
(1) A equimolar liquid mixture of two substances is
ChBE 3110A Thermodynamics [1 Test 3
Fall Semester 2012 Dr. Meredith, Instructor
Name: 53 L T110
Each question is equally weighted in the nal score.
Please show all work for full credit. Box your nal answers.
(1) Metals often undergo oxidation to form
(3) A gas-expanded-liquid is a unique kind of solvent in which a gas is dissolved at high
pressure in an organic liquid. The medium has reduced viscosity and is good for carrying out
many types of reactions. In one such application, methanol liquid is ini
STUDENT NAME
1 (5 points)
Sea water is assumed to consist of 3.5 wt% NaCl in water. The minimum pressure to desalinate sea
water then is
= RT
i
Ci
Mi
C=3.5 wt% = 3.5g/100mL
M=23+35.5=58.5 g/mol
3.5 g
C
= 100 mL = 5.98 x10 4 mol / mL
g
M
58.5
mol
Since N
STUDENT NAME
CHBE 3110A
CHEMICAL ENGINEERING THERMODYNAMICS II
Summer Semester 2009
Exam 3
Thursday, July 9, 2009
Open book and notes
This exam consists of 2 problems, each worth the indicated points. The total number
of points is 50. Please submit your a
1) An equimolar mixture of benzene(1) and toluene(2) is flashed to T = 100 C and
P = 110 kPa. Solve for x1, y1, and V (the fraction existing as vapor). Assume
ideal gas and ideal mixture behavior.
Solution to Problem 1
ChBE 3110 Equation Sheet for Exams
Steady State Energy Balance
Steady State Entropy Balance
H = Q + W
S - Q/T = SG 0
Fundamental Property Relations (Closed Sys)
dU = TdS PdV
dH = TdS + VdP
dA = -PdV SdT
dG = VdP SdT
Ideal Gas Relations
dU = CvdT
dH = CpdT
STUDENT NAME
CHBE 3110A
CHEMICAL ENGINEERING THERMODYNAMICS II
Spring Semester 2012
Exam 1
Thursday, February 9, 2012
1 hour and 20 minutes
Open book and notes
This exam consists of 3 problems, each worth the indicated points. The total number
of points i
STUDENT NAME
CHBE 3110A
CHEMICAL ENGINEERING THERMODYNAMICS II
Spring Semester 2012
Exam 2
Thursday, March 15, 2012
1 hour and 20 minutes
Open book and notes
This exam consists of 4 problems, each worth the indicated points. The total number
of points is
STUDENT NAME
CHBE 3110B
CHEMICAL ENGINEERING THERMODYNAMICS II
Fall Semester 2010
Exam 1
Wednesday, September 15, 2010
Open book and notes
This exam consists of 2 problems, each worth the indicated points. The total number
of points is 50. Please submit y
STUDENT NAME
CHBE 3110B
CHEMICAL ENGINEERING THERMODYNAMICS II
Fall Semester 2010
Exam 2
Friday, October 29, 2010
Open book and notes
This exam consists of 3 problems, each worth the indicated points. The total number
of points is 50. Please submit your a
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ChBE 3110 Exam ll November 10, 2010
This is a closed note exam. However, the Smith, Van Ness and Abbott text as well as a calculator may be
used. Please write all solutions in the blue book provided. Wo
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ChE 3110 Exam III April 8, 2004
This is a closed note exam. However, the Smith, Van Ness & Abbott Text as well as a calculator may be
used. Please write ail solutions in the blue book provided. Work must be shown to receiv
STUDENT NAME
CHBE 3110A
CHEMICAL ENGINEERING THERMODYNAMICS II
Summer Semester 2009
Exam 2
Tuesday, June 23, 2009
Open book and notes
This exam consists of 3 problems, each worth the indicated points. The total number
of points is 50. Please submit your a
ChBE 3110, Fall Semester, 2009 Chemical Engineering Thermodynamics II
Problem Set Five
1. Laboratory alcohol contains 96 mass-percent ethanol and 4 mass-percent water. As an experiment a student decides to convert 200 cm3 of this material into vodka, havi
ChBE 3110, Fall Semester, 2009 Chemical Engineering Thermodynamics II
Problem Set Six
1. Thermodynamics tables and charts may be used when both H and S are tabulated. Since G = H TS, at constant temperature, G = RT ln(f2/f1) = H TS. If state 1 is at low p
ChBE 3110, Fall Semester, 2009 Chemical Engineering Thermodynamics II
Problem Set Seven
1. Two similar liquids form a miscible solution for which the GE may be well represented by a one-term Margules equation, GE = Ax1x2, where A is a constant. Data (300K