midterm 3 2006

midterm 3 2006 - 510.101 Third Exam Name _ 1. (20 points, 4...

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510.101 Third Exam Name ___________________________ 1. (20 points, 4 pts/part) The following bond strengths are in a textbook table: C-C 348, C=C 612, C-I 238, I-I 139, units are kilojoules per mole. Consider the reaction: CH 3 CH 2 CH 2 CH 2 CH=CH 2 + I 2 CH 3 CH 2 CH 2 CH 2 CHI-CH 2 I (hexene) (1,2-diiodohexane) a) Calculate ΔH for one mole of hexene undergoing the reaction. b) Assume that ΔS is -0.1 kilojoules per mole K and the temperature is 300 K (a typical room temperature). Calculate the ΔG 0 for the reaction. c) Calculate the equilibrium constant for the reaction at 300K. R = 0.008 kilojoules per mole K. d) Explain why the equilibrium constant favors the direction indicated in part c. e) At what temperature will the equilibrium constant = 1?
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2. (10 points, 2pts/part) Will the pH go up, go down, or stay essentially the same (no reasons needed) if: a) one mole of acetic acid is added to one liter of water? b) one mole of ammonia is dissolved in one liter of water containing 0.1 moles of acetic
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midterm 3 2006 - 510.101 Third Exam Name _ 1. (20 points, 4...

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