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Chem+2+MIDTERM+2+Form+A++KEY - Midterm 2 Exam Form A CHEM...

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Midterm 2 Exam Form A, CHEM 002 Fall 2008. (Chapters 9, 10, 12, 13 and 14) Name: _________________________  Date: ____________ 1. A mixture of hydrogen atoms and helium ions, He + , were irradiated with  monochromatic radiation whose frequency, v, was 2.46755x10 15 s -1 . The hydrogen  atoms experienced an excitation transition from the n = 1 state to the n = 2 state; did  the helium ions experience an excitation transition as well, and if so, what were the  initial and final states?   a)   No b)   Yes, n = 2 to n = 4 c)   Yes, n = 1 to n = 2 d)   Yes, n = 2 to n = 5 e)   Yes, n = 1 to n = 4   2. If a chemical reaction is said to be exothermic, what is the relationship between the  potential energy of the reactants and the products? a)   The products will possess lower potential energy than the reactants.                        b)   The reactants will possess lower potential energy than the products.                        c)   The products will possess a higher potential energy than the reactants.                    d)   The difference in the potential energy is the energy of activation.   e)   Not enough information given to answer question.
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