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Published byClarence Lynch Modified over 6 years ago
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Exam III Thursday, December 7, 7:00-9:00 pm; rooms are on the website.
Conflict: (12/7) 4:30-6:30 pm in 101 Transportation; sign up in 1026 Chem Annex Conflict with conflict? me right away. Review sessions: Monday, December 4: 7-9 pm 165 Noyes Lab Tuesday, December 5: 7-9 pm 165 Noyes Lab
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Remaining Lectures Wednesday, December 6: review for Exam 3.
Friday, December 8: go over Exam 3. Monday, December 11: review the semester; discuss the final exam; revisit demonstrations. Wednesday, December 13: no lecture; office hours in 3014 Chem Annex from 10am-12pm.
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Clicker Question Consider the activated complex demonstration. Suppose we run two trials, one at 55C and one at 65C. The times for the reaction are 85 seconds and 41 seconds, respectively. Determine the activation energy for this reaction. Assume the frequency factor, A, to be constant. a) 261 J/mol b) 663 J/mol c) kJ/mol d) kJ/mol e) kJ/mol
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Chapter 15 #91
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Chapter 15
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Previous Exam Question
Consider the “Magic Genie” demonstration, in which hydrogen peroxide decomposed to water and oxygen gas with the aid of a catalyst. The activation energy of this reaction (uncatalyzed) is 70.0 kJ/mol. We added a catalyst that lowered the activation energy (at 20C) to 42 kJ/mol. Theoretically, to what temperature (C) would we have to heat the hydrogen peroxide solution so that the rate of the uncatalyzed reaction was equal to the rate of the catalyzed reaction? Assume the frequency factor A to be constant.
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