CHEM HW week 7

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Home>Chemistry homework help>CHEM HW week 7

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?