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The UNIVERSITY OF BRITISH COLUMBIA
Department of CHEMICAL and BIOLOGICAL ENGINEERING
CHBE 241: MATERIAL and ENERGY BALANCES
FINAL EXAMINATION: 2013 W
Instructions:

Hand calculators are allowed
The only allowed material is the formula sheet provided to
Chapter 6
CHBE 241
Lecture 23
Theme: Enthalpy of Reaction
November 27, 2012
E. Gyenge 2012
Lecture Content
Heat capacities at constant pressure vs. constant volume
The enthalpy of reaction
Definition of the standard enthalpy of reaction
Calculation from
Chapter 5
CHBE 241
Lecture 20
Theme: Recap and Review of Selected Concepts and Problems from Chapter 5
November 15, 2012
E. Gyenge 2012
1
Total vapor pressure
Benzene Toluene liquidvapor equilibrium: T x,y and P x,y diagrams
Total vapor pressure =
2
Prob
2009W
CHBE 241 MATERIAL and ENERGY BALANCES
Department of Chemical and Biological Engineering, The University of British Columbia
MIDTERM (2) 10. November. 2009
CHBE 2.04 (3.00  4.50) pm
Problem 1 (15 points)
Hydrogen (H2) can react with oxygen by Reacti
The UNIVERSITY OF BRITISH COLUMBIA
Department of CHEMICAL and BIOLOGICAL ENGINEERING
CHBE 241: MATERIAL and ENERGY BALANCES
MIDTERM EXAMINATION
FORMULA SHEET
=
fc,i
Chapter 5
CHBE 241
Lecture 17
Theme: LiquidVapor Phase Equilibrium
Understanding Distillation using Phase Diagrams
November 6, 2012
E. Gyenge 2012
1
Lecture Content
The concept of phase equilibrium
Saturated vapor pressure of liquids
Antoine equation
Chapter 5
CHBE 241
Lecture 18
Theme: Gibbs Phase Rule
Understanding GasLiquid Absorption with Phase Diagrams
Solid Solubility in Liquids: Phase Diagrams
November 8, 2012
E. Gyenge 2012
1
Lecture Content
The Gibbs phase rule
Absorption of gases in a liq
Chapter 5
CHBE 241
Lecture 14
Theme: Equilibrium Separation Processes
Energy and material as separating agents
October 30, 2012
E. Gyenge 2012
1
Lecture Content
Equilibriumbased separation processes
Energy as separating agent
Material as separating agent
Chapter 5
CHBE 241
Lecture 15
Theme: Performance Specifications in Separations
The Role of Recycle in Separation Processes
October 31, 2012
E. Gyenge 2012
1
Lecture Content
Performance specifications for separators (i.e., system constraints)
Purity of t
Chapter 6
CHBE 241
Lecture 24
Theme: Strategies for Energy Balance Equations and Heat Exchangers
November 29, 2012
E. Gyenge 2012
1
Lecture Content
Strategy for calculating enthalpy and internal energy changes
Steadystate energy balance equations for a
CHBE 241
PROBLEM SESSION
Tutorial 2
Sina Tebianian
Dr. Eld Gyenge
October 9, 2012
Problem 1
P2.35
Note: as an additional exercise before solving question a) carry out
a DOF (degree of freedom) analysis to check if the problem is solvable and
what informat
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CHBE 241
Review Problems
E. Gyenge 2012
1
Problems Recap _ Chapter 6
Problems Recap _ Chapter 6
EBE: assume no heat loss during mixing
MW, NH4NO3 = 80 g/mol
Steps:
1) Mixing and dissolution of ammonium nitrate + water at 22oC and 1 atm
2) Decreasing of so
CHBE 241
PROBLEM SESSION
Tutorial 4
Sona Kazemi
Dr. Eld Gyenge
November 7, 2012
Problem 1
Assume steadystate.
10 EO
30 H2O
EO
H2O
EG
DEG
Problem 1
10 EO
30 H2O
1
2
EO
H2O
EG
DEG
Problem 1
10 EO
30 H2O
1
Component MBE (mol/min)
2
EO
H2O
EG
DEG
Problem 1
1
CHBE 241
PROBLEM SESSION
Tutorial 6
Sona Kazemi
Dr. Eld Gyenge
November 28, 2012
Problem 1:
Assume the column is fed with 100 moll of benzene (as a basis).
Hint:
For 1st question: Utilize Lecture 20: slides 6 to 11. Observe from Px,y diagram
that for a
CHBE 241
PROBLEM SESSION
Tutorial 5
Sona Kazemi
Dr. Eld Gyenge
November 20, 2012
Problem 1
2
Problem 2
Solubility (phase) diagram is provided below:
3
Problem 3
4
Problem 4
5
Problem 5
6
Problem 6
7
Chapter 6
CHBE 241
Lecture 21
Theme: General Energy Balance Equations: Closed vs. Open Systems
November 20, 2012
E. Gyenge 2012
1
Lecture Content
Review of energy related units
Energy Balance on a CLOSED System
1st law of thermodynamics
Internal Energ
CHBE 241
PROBLEM SESSION
Tutorial 1
Dr. Eld Gyenge
Sona Kazemi
Problem 1
Q1: What is inaccurate in the statement of this problem ?
Solution:
2
Problem 1
Solution:
Theoretical
What is the fractional economy if only urea is counted in the denominator ?
The
CHBE 241
PROBLEM SESSION
Tutorial 3
Sina Tebianian
Dr. Eld Gyenge
October 10, 2012
Problem 1
P2.1
Note: this is very easy warmup problem
2
Problem 2
P2.5
3
Problem 3
4
Chapter 6
CHBE 241
Lecture 22
Theme: Latent Heating/Cooling and Heat of Mixtures / Solutions
November 22, 2012
E. Gyenge 2012
1
Lecture Content
Latent Heating/Cooling
Enthalpy of vaporization
Enthalpy Temperature Diagrams: Steam table
Enthalpy of fusi
Chapter 5
CHBE 241
Lecture 16
Theme: Biomedical application of membrane separation: Dialysis
Engineering models of dialysis based on material balance equations
November 1, 2012
E. Gyenge 2012
1
Lecture Content
The principle of dialysis membrane separatio
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2012W
CHBE 241 MATERIAL and ENERGY BALANCES
Department of Chemical and Biological Engineering, The University of British Columbia
Assignment # 4
DUE: NOVEMBER 12, 4PM
Problem 1:
Note: the standard Gibbs free energies of formation and enthalpies of forma
2012W
CHBE 241 MATERIAL and ENERGY BALANCES
Department of Chemical and Biological Engineering, The University of British Columbia
Assignment #3
Problem 1:
Problem 2:
Do a DOF first.
Problem 3:
DUE: OCTOBER 16, 4PM
Problem 4. 3.22
Problem 5. (Read Example
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2012W
CHBE 241 MATERIAL and ENERGY BALANCES
Department of Chemical and Biological Engineering, The University of British Columbia
SOLUTION Assignment #2
Problem 1:
Solution:
2
Problem 2:
Solution:
3
Problem 3:
Solution:
4
5
6
Problem 4:
800 K
Solution:
1
CHBE 241: ASSIGNMENT 1
Due: Sept 24 (Monday), 2012, 4 PM
Submit your assignment in the CHBE241 box situated outside the CHBE office on 2nd floor
2
no net generation