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Oprah Winfrey
Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.
Mark Twain
 Advanced Placement Chemistry 
3rd Quarter
MONDAY
Discussion of time format of 3rd quarter.
Review over calculation of enthalpy.
Homework assigned for 2nd period is slightly altered.
HW1 - do problems 5.19 and 5.20 and on HW2 - do problems 13-28,13-31, and 13-33.
HW1& HW2 (3rd Q) answers
Check the signs of the enthalpy values.
5.19) a) –10.3 kJ
b)-4.71 kJ
c)+3.36 kJ
5.20) a) –13.1 kJ
b)-1.14 kJ
c)+22.9 kJ
13-28) -71.6 kJ
13-31) -3301.3 kJ/mol
13-33) -223.0 kJ/mol
TUESDAY
Review over HW1 and HW2 problems.
Continuation of Enthalpy: BDE and introduction of Entropy.
Homework assigned for periods 2 and 3 will be slightly different. However, the official assignment is below.
Read p.226-242 in Petrucci: Do HW2 - do problems on back of worksheet:8-35c, 8-36a, 8-37ab and 8-38 ab and on HW3- do problems 19.11, 19.12, 19.13, and 19.15 abcd
ANSWERS to HW2 and HW3
19-15 a) -7.4 J/K
b) -145.3 J/K
c)+91.8 J/K
d)-268.2 J/K
The rest of the answers will be discussed in class
WEDNESDAY
Catchup day for periods 2 and 3. Please refer to yesterday's homework assignment - for you to complete.
HW4 - AP Free Response Problem - do problems a,b,and c. Think!
ANSWERS to HW4
a)Three combustion reactions.
b)+8.1 kJ This problem is solved by Hess Law. If you used summation directly, you got the right answer accidentally. Heat of formation can be used but it takes a series of steps. Remember, the heat of combusion of ethanol is NOT necessarily the heat of formation of ethanol.
c)-181.9 J/K
THURSDAY
Discussion of possible answers for HW4.
Return and discussion over free response and multiple choice of MIDTERM.
FRIDAY
QUIZ 1 (2x) First Grade of the 3rd Quarter
19 Perfect Scores on Quiz 1
MAKEUPS TODAY from 5:00 - 6:00 pm
Please e-mail Mr. Salon about your intent to make up. Only make-ups that are EXCUSED are allowed. Due to teacher schedule, this is the only day for MAKEUPS this week.
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