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winter 08 final exam

winter 08 final exam - CHEM 102 Winter 08 Final Exam On the...

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CHEM 102 Winter 08 Final Exam On the answer sheet (scantron) write your Name, Student ID Number, and Recitation Section Number. Choose the best (most correct) answer for each question AND ENTER IT ON YOUR ANSWER SHEET. Potentially useful information: a c a b b x 2 4 2 ± = [ ] [ ] acid base pK pH a log + = Δ G° = Δ H° - T Δ Δ G = Δ G° + RT ln Q Δ G° = -nFE° Q F n T R E E ln ° = R = 8.314 J mol -1 K -1 F = 96480 C/mol e - 1. Which statement about heat of fusion and heat of condensation is correct? a. There is no general relationship between these two quantities, and the values depend on the substance involved. b. The heat of fusion is always less than the heat of condensation. c. The heat of fusion is exactly equal to the heat of condensation. d. The heat of condensation is equal in magnitude but opposite in sign when compared to the heat of fusion. ANSWER: a 2. The transition from Phase I to Phase III is called Page 1 of 10
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3. Which group includes only endothermic processes? 4. Which general class of compounds below would you expect to have the lowest vapor pressure? 5. Which statement about structural isomers is true? a. Structural isomers always contain double bonds. b. Structural isomers have the same molecular formulas. c. Structural isomers have the same chemical properties. d. Structural isomers only occur among straight chain compounds. ANSWER: b 6. Assume all hydrocarbons given are linear. Which compound will contain a double bond? 7. Which of the following compounds can exhibit cis-trans isomerism? Page 2 of 10
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