Summer 08 Exam 1_v1 key

Summer 08 Exam 1_v1 key - Chemistry 105 B Exam 1 07/14/08...

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1 Chemistry 105 B PLEASE PRINT YOUR NAME IN BLOCK LETTERS Exam 1 Name: __________________________________ 07/14/08 Last 4 Digits of USC ID:____ ____ ____ ____ Dr. Jessica Parr Lab TA’s Name: _________________________________ Question Points Score Grader 1 27 2 9 3 10 4 5 5 5 6 15 7 9 8 8 9 12 Total 100 Please Sign Below: I certify that I have observed all the rules of Academic Integrity while taking this examination. Signature: _______________________________________________________________ Instructions: 1. You must show work to receive credit. 2. If necessary, please continue your solutions on the back of the preceding page (facing you). 3. YOU MUST use black or blue ink. (No pencil, no whiteout, no erasable ink.) 4. There are 9 problems on 13 pages. Please count them before you begin. A periodic table and some useful equations can be found on the last page. 5. Good luck!! =) First Letter of last Name
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2 1. (27 pt) Circle the correct answers for the following questions. i. The catalyzed pathway in a reaction mechanism has a __________ activation energy that causes a _____________ reaction rate. a) higher, lower b) higher, higher c) lower, higher d) lower, steady e) higher, steady ii. Which of the following statements best describes the condition(s) needed for a successful formation of a product according to the collision model. a) The collision must involve a sufficient amount of energy, provided by the motion of the particles, to overcome the activation energy. b) The relative orientation of the particles has little or no effect on the formation of the product. c) The relative orientation of the particles has an effect only if the kinetic energy of the particles is below some minimum value. d) The relative orientation of the particles must allow for formation of the new bonds in the product. e) The energy of the incoming particles must be above a certain minimum value and the relative orientation of the particles must allow for formation of new bonds in the product. iii. For a particular system at a particular temperature there _________ equilibrium constant(s) and there __________ equilibrium position(s). a) are infinite, is one b) is one, are infinite c) is one, is one d) are infinite, is one e) none of these iv. Which of the following is true for a system with a relatively small equilibrium constant? a) It will take a short time to reach equilibrium
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This note was uploaded on 07/22/2008 for the course CHEM 105A taught by Professor Bau during the Summer '04 term at USC.

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Summer 08 Exam 1_v1 key - Chemistry 105 B Exam 1 07/14/08...

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