University of California, Davis
Department of Chemical Engineering and
Materials Science
ECH 51: Material Balances
(CRN# 19133)
Winter Quarter 2008
MW (2:10-4:00 PM)
Room 179 Chemistry
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| Instructors: |
B. G. Higgins |
| Office : |
Bainer 3012 |
| Office Hours: |
T&F 12:40-2:00 pm |
| Phone: |
752-8780 |
| e-mail: |
bghiggins@ucdavis.edu |
Course Overview
The following Concepts & Skills will be emphasized in ECH51
CONCEPTS
- Two axioms for the mass of multicomponent systems.
- Bodies and control volumes.
- Fluxes at entrances and exits of control volumes.
- Accumulation in control volumes.
- Conservation of atomic species.
- Solution of sets of algebraic equations.
- Analysis versus design.
SKILLS
- Construction of control volumes for mass balance problems.
- Solution of sets of algebraic equations.
- Manipulation of mole fractions, and mass fractions.
- Manipulation of mass average velocities, molar average velocities, to determine fluxes at entrances and exits.
- Determine stoichiometric constraints for reacting systems
The text for the course is : Material Balances for Chemical Engineers, R.L. Cerro, B.G. Higgins and S. Whitaker, UCD Bookstore.
The book can also be downloaded in PDF format from the following web site: Material Balances.
It will also be offered for sale in the UCD bookstore for a nominal price to cover printing costs.
Course Grade
The overall letter grade for the course will be determined as follows:
Class Exam #1 40% , Class Exam #2 40%, and homework 20%. Grades will not be assigned on the basis of a curve.
The approximate, absolute scale is given by
| A: 70 - 100% | | B: 55 - 69% |
| C: 40 - 54% | | D: 25 - 39% |
| F: 0 - 24% |
There will be no final exam.
The grade will be based on two in-class exams. The in-class exams will be held on:
In-Class Exam #1: Monday February 11 (2:10-4:00 pm),
In-Class Exam #2: Monday March 17 (2:10- 4:00pm)
Homework & Exams Policies:
All homework must be turned in before the beginning of the class. Problems should be in order and stapled together.
Homework that is not stapled will not be graded. Late homework will not be accepted unless prior arrangements have been made.
Some homework assignments are longer than others, and it is your responsibility to allot the appropriate amount of time for each assignment.
Answers to all homework problems and the grading key for all exams will be available from this site as PDF files.
When doing the homework, you should remember the words of Confucius:
"I hear, and I forget. I see, and I remember. I do, and I understand."
In class, you hear and see. When you study the text, you see. When you do the homework by yourself, you do. Don't waste 2500 years of wisdom.
- Rules: If an emergency occurs and you need special attention, contact Professor Higgins as soon as possible.
All exams will be closed book and closed notes, and questions will be neither asked nor answered.
All personal belongings must be stored under your chair during exams. Cell phones are not allowed in the exam room.
Monitors may confiscate any and all material to which you have access during exams.
No make-up exams will be given, and students who miss an exam for justifiable reasons will be assigned an
appropriate grade on the basis of their scores in the other exams. Students will be required to bring an unmarked Legal Blue Exam book to the exam.
- Re-grading: If, after having read the grading key, you
believe that your exam should be re-graded, you should prepare a written statement
indicating why the exam should be re-graded, staple your written statement to your exam,
and deliver your statement and exam to Professor Higgins. No exams or homework will be accepted
for re-grading one week after the exams or homework have been returned.
- Integrity: Perhaps the most productive learning atmosphere occurs when you ask a question1,
thus you are encouraged to ask questions in class and while studying with other students.
Questions and answers help to clarify concepts, and you are encouraged to share concepts and
ideas concerning homework problems. However, the work that you submit for a grade in this
course must be your own, i.e., you must be the master of the material to which you have
affixed your signature. Evidence of any violations of the UCD Code of Academic Conduct
will be sent directly to Student Judicial Affairs. If you are unsure of what is meant
by plagiarism, cheating, academic dishonesty, etc., see the UCD Code of Academic Conduct.
A brief explanation is given in the Schedule & Directory under the title of Integrity
and details are available here
Classroom Behavior
The classroom will be a place of orderly discussion of material balances.
If you wish to discuss personal matters with your neighbor, you must do so elsewhere.
Special Needs
If you have a disability that impacts on your learning, we encourage you to talk with Prof. Higgins about it on a confidential basis so that we might collectively devise a strategy to overcome whatever barriers might exist.
Class Assistants
The TA assigned for this course are Van Leang. He can be reached by email:vmleang@ucdavis.edu
The Reader assigned for this course is Jenny Hwang. She can be reachedby email: jhshuang@ucdavis.edu
Van Leang will hold office hours are Tuesday/Thursday from 3:00-4:00 pm in the Department Computer Lab ( Bainer 2129b ),
at the desk by the printers.
References
- R.P. Feynman, "There is no learning without having to pose a question", The Pleasure of Finding Things Out, Perseus Publishing, Cambridge, MA