Quiz Solutions

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rielapopp3O
Posts: 14
Joined: Wed Sep 21, 2016 3:00 pm

Quiz Solutions

Postby rielapopp3O » Sun Mar 19, 2017 2:02 am

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

Bryan Vega 2E
Posts: 12
Joined: Wed Sep 21, 2016 2:56 pm

Re: Quiz Solutions

Postby Bryan Vega 2E » Sun Mar 19, 2017 2:07 am

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

Bryan Vega 2E
Posts: 12
Joined: Wed Sep 21, 2016 2:56 pm

Re: Quiz Solutions

Postby Bryan Vega 2E » Sun Mar 19, 2017 2:14 am

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

Bryan Vega 2E
Posts: 12
Joined: Wed Sep 21, 2016 2:56 pm

Re: Quiz Solutions

Postby Bryan Vega 2E » Sun Mar 19, 2017 2:15 am

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.

Bryan Vega 2E
Posts: 12
Joined: Wed Sep 21, 2016 2:56 pm

Re: Quiz Solutions

Postby Bryan Vega 2E » Sun Mar 19, 2017 2:16 am

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

syun3c
Posts: 4
Joined: Wed Sep 21, 2016 2:57 pm

Re: Quiz Solutions

Postby syun3c » Sun Mar 19, 2017 2:24 am

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

Ashley_Thomas_3C
Posts: 20
Joined: Wed Sep 21, 2016 2:56 pm

Re: Quiz Solutions

Postby Ashley_Thomas_3C » Sun Mar 19, 2017 3:34 am

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.


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