KellyCHEM2BWinter2006MT1

KellyCHEM2BWinter2006MT1 - Name_ Student ID Number_ LAB...

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Name__________________________________________________ Student ID Number_______________________________________ LAB Sec. # _____; TA: ____________; Lab day/time: __________ Prof. Peter B. Kelly Spring 2006 CHEMISTRY 2B (Sec. A) 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 (if it is a programmable calculator, its memory must be cleared before the exam). (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 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. (12 points) / 12 #22. (20 points) / 20 REGRADE BONUS 4/4 Total Score (120) /120 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 11 Initial:___________ Part I: Multiple Choice, Concepts Circle the correct answer and circle your response on the cover – No partial credit 1. (3 pts) ) In the diagram, point D is best described as the A) Normal boiling point. B) Normal melting point. C) Triple point. D) Critical point. E) Saturation point. 2. (3 pts) Calculate the U for a system that releases 40.0 kJ of heat when compressed at a constant pressure of 1,003.12 kPa from 100.0 L to 50.0 L. Note that 1 kPa x 1L = 1 J. A) –90.0 kJ B) –50.0 kJ C) 10.0 kJ D) 60.0 kJ E) none of the above 3. (3 pts) Consider the explosive formation of H 2 O(l) in the class demonstration 2H 2 (g) + O 2 (g) 2H 2 O(l) The enthalpy change for this reaction is A) + 2 ° f H(H 2 O( l )) B) – 2 ° f H(H 2 O( l )) C) ° f H(H 2 O( l )) D) – 2 ° f H(H 2 (g)) – ° f H(O 2 (g)) E) 2 ° f H(H 2 (g)) + ° f H(O 2 (g))
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Midterm I Page 3 of 11 Initial:___________ 4. (3 pts) An exothermic change A) Requires heat and has a negative H B) Produces heat and has a negative H C) Requires heat and has a positive H D) Produces heat and has a positive H E) Does not involve heat transfer and H = 0 5. (3 pts) Vaporization is A) Exothermic B) Endothermic C) Thermo–neutral D) Independent of intermolecular forces E) Independent of pressure 6. (3 pts) ) The molar heats of vaporization of the halogens, F
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KellyCHEM2BWinter2006MT1 - Name_ Student ID Number_ LAB...

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