Spring 2009
|
Number of Students who took the exam |
44 |
|
Average |
70.5 |
| Median | 74 |
|
High |
103 |
|
Low |
8 exams < 50 |
Solution Key -
See Your
Homework, Lab and lecture examples - even the practice questions. You will
find similar ones there.
Numeric Answers for S'09:
1 a- g - see lecture notes and the text
2a) -17 KJ, Exothermic ( use Products minus Reactants )
b) -44 J; Less flexible; less conformations in the molcule
c)- 4 KJ; Spontaneous
d) 0 KJ ( or nearly 0 KJ); This is the point where K=1; the reaction changes here from Spontaneous to Non-Spontaneous.
3 a) see CPR#3 and your lab observations
b) q = 1013 C; 1.33 g I2
4a) Either 0.060 V or -0.80 V ; depending on your balanced REDOX equation. Note: both answers ARE NOT the actual std red potential for the Ag+ ion ( see Tables ) - my mistake in choice.
b) see your lab and text and lecture notes
c)potential = 0 ; this is not the standard potential; -17.4 KJ; K = 1.1 x 10^3
d) Test Cell at 275K; Get new std potential , then get K.