exam107 - Name Student ID Number LAB Sec TA Lab day/time Dr...

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Name__________________________________________________ Student ID Number_______________________________________ LAB Sec. # _____; TA: ____________; Lab day/time: __________ Dr. Matthew P. Augustine Winter 2007 CHEMISTRY 2B (Sec. C) Midterm I Instructions: CLOSED BOOK EXAM ! No books, notes, or additional scrap paper are permitted. All information required is contained on the exam. Place all work in the space provided. If you require additional space, use the back of the exam. A scientific calculator may be used and the last page of this exam includes a list of prohibited items. (1) Read each question carefully. (2) For Parts I and II , there is no partial credit given and only answers marked on this cover page will be graded . (3) The second to last page contains a periodic table and some useful information. You may remove it for easy access. (4) If you finish early, RECHECK YOUR ANSWERS! (5) Circle your choice on the right for the multiple choice questions 1 – 20. U.C. Davis is an Honor Institution Possible Points Points #1–12. (3 points each) / 36 #13-20. (6 points each) / 48 #21. (14 points) / 14 #22. (18 points) / 18 REGRADE BONUS 4/4 Total Score (120) / 1.2 = % Multiple Choice (circle one) 1. A B C D E 2. A B C D E 3. A B C D E 4. A B C D E 5. A B C D E 6. A B C D E 7. A B C D E 8. A B C D E 9. A B C D E 10. A B C D E 11. A B C D E 12. A B C D E 1-12 total pts: 13. A B C D E 14. A B C D E 15. A B C D E 16. A B C D E 17. A B C D E 18. A B C D E 19. A B C D E 20. A B C D E 13-20 total pts:
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Midterm I Page 2 of 13 Initial:___________ Part I: Multiple Choice, Concepts Circle the correct answer and circle your response on the cover – No partial credit 1. (3 pts) A reaction is carried out inside of a sealed balloon. After the reaction occurs, the balloon is twice its original volume but there is no change in temperature. Which of the following is true: A. The reaction is endothermic and the surroundings performed work on the balloon. B. The reaction is exothermic and the surroundings performed work on the balloon. C. The reaction is endothermic and the balloon performed work on the surroundings. D. The reaction is exothermic and the balloon performed work on the surroundings. E. There is not enough information to tell whether the reaction is exothermic or endothermic but the balloon performed work on the surroundings. 2. (3 pts) When a pure liquid boils, the partial pressure just above the surface of the liquid A. is much lower than atmospheric pressure. B. is the same as atmospheric pressure. C. is much higher than atmospheric pressure. D. is zero because all the liquid has vaporized. E. is impossible to know without more information. 3. (3 pts) The standard enthalpy of formation of a chemical reaction A. is the mole–weighted sum of the heats of formation of the reactants minus the mole–weighted sum of the heats of formation of the products. B. is the mole–weighted sum of the heats of formation of the products minus the
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exam107 - Name Student ID Number LAB Sec TA Lab day/time Dr...

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