HWKey (13)

# HWKey (13) - energy diagram label the positions of A B and...

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Problem of the Day #12 – Answer Key Deadline : 3:00 p.m., Wednesday, 6/25/08 LATE WORK WILL NOT BE ACCEPTED OR GRADED!!! This problem is worth a total of 20 raw points. A certain compound A is converted into a compound B in a reaction that occurs in a single step, without any intermediates. H for this reaction is –15 kcal/mol, and G is +30 kcal/mol. Please answer the following questions about this hypothetical reaction. (a) (10 points) Complete a sketch of a reaction energy diagram for the A B reaction using the template below. Assume that the absolute energy associated with A is 0 kcal/mol. In your reaction
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Unformatted text preview: energy diagram, label the positions of A , B , and the transition state ( TS ). Also be sure to label ∆ H and ∆ G ‡ in your diagram (use arrows like we did in lecture when we discussed reaction energy diagrams). (b) (5 points) Is the reaction A → B exothermic or endothermic ? Circle your answer below: EXOTHERMIC ENDOTHERMIC (c) (5 points) What is activation energy ( ∆ G‡) of the reaction where B is converted into A ( B → A )? Write your answer in the box below: Reaction Progress Energy (kcal/mol) +20 +40 –20 Reaction Progress A B TS ∆ G ‡ ∆ H +45 kcal/mol...
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## This note was uploaded on 08/07/2008 for the course CH 310M taught by Professor Iverson during the Summer '05 term at University of Texas.

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