University of MarylandENME
... [Show More] 382Midterm1-ENMA300-F2012-solns
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Fall 2012, ENMA 300/ENME 382 MidTerm 1 Prof Foecke’s Section
Instructions: (written by Prof. Cristou)
1. SHOW YOUR WORK (including the equations that you use to derive an answer).
2. All work must be done on the exam itself, if you need extra space write on the back of the question.
3. Read each question carefully and answer the question asked!
4. If it is appropriate, make assumptions to solve the problems. Be sure to state the assumptions you make.
5. Be consistent within a given problem.
6. Remember you only have 50 minutes to complete the exam. Look at the point values of each question to
determine how to spend your time. Point values will not necessarily be split evenly between parts.
7. A person with normal size handwriting should be able to answer each question in the space allotted. If you
need more space, continue your answer on the back of the page and indicate which question you are answering.
8. If your answer is not understandable (due to the legibility of your writing or the "English"), it will be marked
incorrect. You do not have to write perfect English sentences, "bullet format" is acceptable as long as we can
understand what you are saying.
9. Be sure to define terms in any equations you use!
10. You can and should ask questions if you feel something is unclear. However, we reserve the right not to
answer questions that would "give away" the answer.
___________________________________________________________________________
2
Problem 1. (20 pts)
(a) What type of bonding does CaO have? Use appropriate calculations to justify your answer.
(4 Points) NOTE: EN(Ca)=1.0 and EN(O)=3.5
Using the %IC equation, we find the bonding of CaO to be 79% ionic, the remainder covalent. [Show Less]