CHEM HW week 7

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http://www.a-pdf.com

1.Define electrolysis.

 

How is this used to generated hydrogen gas for fuel cells?

1.  Consider This 8.24 (pg. 362) – We can obtain renewable energy from the wind, the oceans, or geothermal sources, not only from the Sun or biomass  Pick one of the renewable energy sources and learn more about the technologies available to harness it.

           

a.  Name the geographic restrictions (if any) to its use.

            b.  Prepare a list of the reasons to support this technology.  Prepare a similar list for the      nay-sayers.

            c.  Predict how this technology will affect energy production capacity where you live.

           

2.  Chapter 8, Question 30 (pg 365) – “The Earth is a metal-rich rock.  I can’t see the human race running out of metals when it will be possible to mine in new places or recycle or simply reduce consumption.  We probably won’t be able to live on the planet due to global warming or other environmental problems before we run into a metal supply problem.”  These comments were offered by geologist Maurice A Tivey of Woods Hole Oceanographic Institution in an article in Chemical & Engineering News published in June 2009.

            a.  Do you agree with the writer’s sentiment about not running out of metals?  Explain.

            b.  Name two challenges connected with increasing the recycling of batteries.

 

Chapter 8, Question 36 (pg 366) – What is the tragedy of the commons?  How does this concept apply to our practice of using metals such as mercury and cadmium in batteries?

Chemistry 121 – Chemistry in the Modern World

Weekly Worksheet 7

Directions: Answer the following questions using your textbook. Remember, these are the types of questions that will be on the proctored exam. Create a separate Word document listing the correct answers and submit it in the Assignments folder. Use as a title your name and the week number. For example, I would call this assignment Matton7. Each question is worth 1 or 2 points, for a total of 40 points.

1. Chapter 8, Question 2a

2. Chapter 8, Question 2b

3. Chapter 8, Question 2c

4. Chapter 8, Question 7a (4 points)

5. Chapter 8, Question 7b

6. Chapter 8, Question 7c

7. Chapter 8, Question 8a (2 points)

8. Chapter 8, Question 8b (2 points)

9. Chapter 8, Question 9a

10. Chapter 8, Question 9b

11. Chapter 8, Question 9c

12. Chapter 8, Question 9d

13. Chapter 8, Question 10a (2 points)

14. Chapter 8, Question 10b (2 points)

15. Chapter 8, Question 10c

16. Chapter 8, Question 12a (2 points)

17. Chapter 8, Question 12b

18. Chapter 8, Question 12c

19. Chapter 8, Question 14 (2 points)

20. Chapter 8, Question 15 (2 points)

21. Chapter 8, Question 16 (2 points)

22. Chapter 8, Question 18 (2 points)

23. Chapter 8, Question 20 (2 points)

24. Chapter 8, Question 21 (2 points)

25. Chapter 8, Question 24 (2 points)