CHEMISTRY COMMUNITY

Is there any place to find the solutions to the three quizzes we took?

Quiz 1 answers as previously posted by Dr. Lavelle
1. ΔU = 310 J

2. ΔU = 0 kJ

3. w = –5.48 kJ
q = +5.48 kJ
ΔU = 0

4. +29.5 kJ⋅mol-1

5. N2H4(l) + H2(g) → 2NH3(g) –151 kJ⋅mol-1

6. 51.2 g

7. 2 and 3

8. no temperature

9. ΔG and ΔSsys

10. +0.683 J⋅K-1

11. 75.9 g

12. 2Fe2O3(s) + 3C(s, graphite) → 4Fe(s) + 3CO2(g)

301 kJ/mol

Quiz 2 Answers

1. 2 N2O5(g) → 4 NO2(g) + O2(g)
5.78 (mol NO2)⋅L–1⋅s–1

2. False

3. 2 N2O(g) → 2N2(g) + O2(g)
120 sec

4. first-order
2.00 s–1

5. has a rate that does not change much with temperature.

6. 0.30 M

7. 9.88×10−3 min−1 or 1.65 ×10−4 s−1

8. 6.06 min

9. D

10. false

11. 100 min−1

Quiz 3 Preparation Answers

1. 4-isopropyldecane or 4-(1-methylethyl) decane

2. Draw hexane structure with ethyl and methyl both attached to carbon 3 in hexane main chain.

3. Alkenes not covered in your Quiz 3. Your Quiz 3 covers more Kinetics.

4. 4-butyl-1,2-dimethylcyclohexane

5.
What type of reaction is shown above?
ELECTROPHILIC ADDITION REACTION

How many steps are involved?
2 steps

How many transition states?
2

Which is the rate limiting step?
1st step

How many intermediates are there?
2


6. Both are nucleophiles.

7. 2,3-dichlorobutane

8. Br2 acts as an electrophile.

These are all the answers to the practice quizzes in our course reader!

Are there solutions to the quizzes we took in class? Not the quiz preps.

syun3c wrote:Are there solutions to the quizzes we took in class? Not the quiz preps.

nope, you'll have to search for some on chem community with key words. not all are there.