CH E 232

Material and Energy Balances

Spring 2012


Catalog Description (2011-2012): Multi-component material and energy balances in chemical reactions and processes. Compressibility of real gases. Single and multi-phase material balances of multiple component chemical processes. Energy balances of reactive and non-reactive systems. Properties of ideal mixtures.

Student Outcomes: At the end of this course, each student should be able to:

  1. Draw and label a flow diagram given a process description
  2. Set up and solve mass balance problems for systems with and without chemical reaction and/or recycle streams.
  3. Decide when and how to use the ideal gas and compressibility factor equations of state.
  4. Understand and use simple vapor-liquid, liquid-liquid, and solid-liquid equilibrium relationships.
  5. Set up and solve energy balances on reactive and non-reactive systems.
  6. Use thermodynamic relations and data tables to determine heats of reaction, formation, and combustion.


Instructor

Randel M. Price
Associate Professor, Chemical Engineering
126 Nolan Engineering Building
Phone: 321-3412
Email: rprice@cbu.edu

I can usually be found in or around my office from about 7:30 in the morning until about 4:00 in the afternoon. Please feel free to stop by the office as needed, even if it is not during the posted office hours.

You are welcome to phone or email to arrange an appointment. Appointments are not necessary, but are nice if you think you need a sizeable block of time.

A daily schedule using Google Calendar is also linked and will show meetings, etc.


Textbook

The text for this class will be:

Either the original 3rd edition (2000) or the 2005 "Integrated Media Edition" will be suitable for the class. The two editions differ in the way they integrate the CD-ROM supplied with the text.

You are encouraged to consult other texts. Among those I will probably be using are:

Useful material will also be found in your thermodynamics text.

The library no doubt has many other relevant texts and journals. Use it to your advantage. I may also place reference material chosen to supplement the text on reserve at the library.

Notes on the Text

If you find a misprint, etc., in the text, please let me know so that the information can be shared. At present, I am not aware of any necessary changes.


Class Policies

Collaboration

Generally speaking, students are encouraged to work together to understand the course material. Students are allowed to cooperate on all "regular" homework problems, unless specifically requested not to do so. All students must turn in individual assignments. Penalties will be imposed if there is evidence that students did not individually prepare their work. Some "design" homework assignments may be assigned to small groups. In these cases, please do not collaborate outside your group.

Collaboration is not permitted on any exam.

Exams

Current plans (subject to change -- your opinions are invited) are to have three or four tests during the semester. I will attempt to space them roughly equally, and will normally provide a minimum of one week's firm advance notice of each. A test will typically consist of two or three problems.

All regular exams will be open-book, open-note. The final examination will be open-book only -- notes and other unpublished materials will not be permitted.

No make-up exams will be given without advance arrangements (made before the day of the exam).

Collaboration is not permitted on any exam.

My goal for an exam problem is for the student to prove they know how to apply their knowledge to an unfamiliar situation. By contrast, homework is intended to exercise more basic skills. This means that test problems will not be "like the homework". Be warned.

Exam Tips

If you are really interested in maximizing your exam score, keep in mind that if I don't understand what you're doing, you probably won't get all the points you may have earned. Also remember that I'm usually matching your paper against a solution of my own, so you want the similarities to jump out at me while any differences hide under a bushel.

With this in mind, be sure to

Grading

Grades will be determined by student performance on graded homework asssignments, examinations, and a comprehensive final examination. The components of the grade will be weighted so that:

The target grading curve will be determined by a 90, 75, 60, 50 scale. The grades actually assigned may be adjusted downward to reflect overall class performance (the class average score), using natural breaks in the score distribution. The class average score will typically correspond to a "C" grade. Adjustments will never raise a cutoff.

This grading scale does not apply to those students who fail to achieve at least 35% on the final exam. In such cases, an appropriate grade will be determined without strict reliance on the scale.

All students should be aware that performance on the final is very important, and that qualitative weight is given to work at the end of the semester over that at the beginning.

Homework

The best way to acquire the skills this course seeks to teach is practice. Homework assignments are the best opportunity to do so. Students are encouraged to work as many homework problems as they can in order to improve their knowledge. The assigned homework sets should be viewed as the minimum needed; most students will benefit from working additional problems.

Homework is due by the beginning of class on the designated due date unless other instructions are given at the time of the assignment. Late homework is not accepted unless arrangements are made in advance of the deadline. Waiting too long before starting an assignment is never an acceptable reason for being late.

All homework assignments must meet the following requirements. Assignments which do not comply will not be graded.

Late Assignments

NOTHING will be accepted late unless arrangements were made prior to the due date. If a student is to be out of town, the instructor must be notified in advance. In case of illness, the instructor should be notified before the assignment becomes late, either by phone (901)321-3412 or email.

Makeup exams will only be given under extraordinary circumstances, and only if arrangements are made before the exam period.

Extra Credit

There are two ways to earn "extra credit" or "bonus" points. These are added to your point totals but don't add to the "possible" points. Your options are:

  1. Design Your Own Test Problems for credit applicable to your test total. A maximum of three problems may be submitted with deadlines falling on the class period closest to and following Feb 1, Mar 1, and Apr 1.
  2. Participate in recognized professional development activities (plant trips, non-required technical lectures, etc.) for credit applicable to your final exam total. I plan to award 2 pts. for the first two acceptable (approved in advance) events and one point thereafter. I also reserve the right to limit the total points awarded to any individual. Most "technical" events sponsored by AIChE are automatically acceptable, as long as they are not required activities of some other course. Events sponsored by other engineering groups usually count, but should be cleared in advance if you want the credit.

Lecture Notes

Outlines of the following lectures are available on the web. Please let me know if you have problems downloading or viewing these.

From CHE 111: For CHE 232:

Related Links

These are links that you might find helpful as you study for this class. If you find any of them particularly useful (or especially useless), or if you want to suggest an addition to the list, please email and let me know.

Last Revised: 2 January 2010 by RMP
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