Chemistry 121 Exam 2 Key

Question "25" will not be scored.  All students will receive full credit (4 points) regardless of response.

25.  Which one of the following statements is TRUE?
(A)       The CH 121 Final Exam is scheduled for 7:30-9:20am on Tuesday, December 6, 2005.
(B)       The CH 121 Final Exam is scheduled for 7:30-9:20am on Tuesday, December 6, 2005.
(C)       The CH 121 Final Exam is scheduled for 7:30-9:20am on Tuesday, December 6, 2005.
(D)       The CH 121 Final Exam is scheduled for 7:30-9:20am on Tuesday, December 6, 2005.
(E)       The CH 121 Final Exam is scheduled for 7:30-9:20am on Tuesday, December 6, 2005.

Question "24" will not be scored.  All students will receive full credit (4 points) regardless of response.  I didn't care for the presentation of this topic in the course materials.

24.  Consider: 2 C8H18 (l) + 25 O2 (g) → 16 CO2 (g) + 18 H2O (l) ΔH˚reaction = -10900 kJ

How much energy is released when 4.0000 moles of octane, C8H18, is combusted?

(A)       10900 kJ.
(B)       21800 kJ.
(C)       32700 kJ.
(D)       43600 kJ.
(E)       87200 kJ.

Exam 2 scores will be posted Friday (barring a technology failure).  Scores will be posted of 100 points in which 8 points will be added to your score for questions "1-23."

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