CHEM 2B Final Exam Spring06 - KEY

CHEM 2B Final Exam Spring06 - KEY - Name_ Student ID...

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Name__________________________________________________ Student ID Number_______________________________________ LAB Sec. # _____; TA: ____________; Lab day/time: __________ Dr. Bryan Enderle Spring 2006 CHEMISTRY 2B (Sec. D) Final Exam 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. (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 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. U.C. Davis is an Honor Institution Possible Points Points #1–13. (3 points each) / 39 #14-22. (6 points each) / 54 #23. (20 points) / 20 #24. (20 points) / 20 #25. (30 points) / 30 Total Score (163) / 1.63 = % 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 13. A B C D E 1-13 total pts: 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 21. A B C D E 22. A B C D E 14-22 total pts: Multiple Choice (circle one)
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Final Exam Page 2 of 15 Initial:___________ Part I: Multiple Choice, Concepts Circle the correct answer and circle your response on the cover – No partial credit 1. (3 pts) Which liquid would be the most volatile? A. CH 3 CH 2 CH 2 CH 2 CH 2 Cl B. HO CH 2 CH 2 CH 2 CH 2 OH C. CH 3 CH 2 CH 2 CH 2 CH 2 CH 3 D. CH 3 CH 2 CH 2 CH 2 CH 2 H E. CH 3 CH 2 CH 2 CH 2 CH 2 OH 2. (3 pts) Which aqueous solution would have the lowest freezing point? A. 0.30 molal sucrose. B. 0.15 molal copper II nitrate. C. 0.25 molal acetic acid (% dissociation less than 5%). D. 0.20 molal sodium hydroxide. E. Pure water. 3. (3 pts) The phase diagram for a pure substance is given below. The substance is stored in a container at 80 atm at 25°C corresponding to the point indicated. Approximately what is the molar enthalpy change of the system when cooled to -25°C through a phase change and under constant pressure? ( c represents the molar heat capacity) A. H fus + liquid c ×50 K B. H vap + liquid c ×50 K C. −∆ H fus liquid c ×50 K D. −∆ H vap vapor c ×50 K E. −∆ H vap liquid c ×50 K
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Final Exam Page 3 of 15 Initial:___________ 4. (3pts) The coordination number of an atom at the corner of this unit cell is A. 6 B. 3 C. 4 D. 8 E. depends on adjacent unit cells. 5. (3 pts) Write the K sp expression for Sn(OH) 2 .
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CHEM 2B Final Exam Spring06 - KEY - Name_ Student ID...

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