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Announcements Tuesday, May 3

Announcements Tuesday, May 3. FINAL When: Tuesday, May 10, 7:30 – 9:30 Where: in our usual room. BRING YOUR 5” x 7” card with notes. BRING “problem” exams (misgraded, etc.) HELP SESSIONS: JUST DROP IN FOR HELP!!!! Wednesday at 5 pm, here Next Monday at 7 pm, TBA

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Announcements Tuesday, May 3

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  1. AnnouncementsTuesday, May 3 FINAL When: Tuesday, May 10, 7:30 – 9:30 Where: in our usual room. BRING YOUR 5” x 7” card with notes. BRING “problem” exams (misgraded, etc.) HELP SESSIONS: JUST DROP IN FOR HELP!!!! Wednesday at 5 pm, here Next Monday at 7 pm, TBA EXTRA CREDIT (10 PTS) Find the error in the hydrogen car article.

  2. Today’s Factoids Population of China: 1,300,000,000 (20% of global population) Population of USA: 300,000,000 Log10(China) = 9.1 Log10(USA) = 8.5 U.S. –awarded Ph.D.’s in science & engineering: ~25,000/year

  3. RedOx

  4. A sample case 2Na + 2H2O 2Na+ + H2 + 2OH- Na was oxidized: Na  Na+ + e- (electron lost) H was reduced: lost oxygen O no change: lost H but gained e- Remember…we actually ran this reaction by dumping some sodium into water.

  5. Another one 2 CH3OH  2 CH2O + H2 C: ??? H: ??? H: ??? O: ???

  6. CH3CH2CH2CH=CHCH2CH3 + H2 CH3CH2CH2CH-CHCH2CH3 H H Still another one (related to “butter vs. margarine”) C ????? H ?????

  7. Secret Agents: all part of the semantics nightmare that is RedOx • Something that promotes reduction: reducing agent • Example: K, Na, H, LiAlH4 • Something that promotes oxidation: oxidizing agent • Example, O, F, Br, K2Cr2O7

  8. Main Applications of RedOx Recovery of metals from ores Corrosion Prevention of corrosion Batteries

  9. Steel! And the sons ofPullman porters & the sons of engineersRide their fathers' magic carpet made of steel Mothers with their babes asleep, rockin' to the gentle beatAnd the rhythm of the rails is all they feel City of New Orleans—Steve Goodman

  10. Images of steel production

  11. Reducing Iron Ore to Make Steel:from rust to riches 2 Fe2O3 + 3C 4 Fe + 3CO2 From Coal Rust i.e., ore How steel is really made: http://www.sidmar.be/CONTENT/2c.htm

  12. RedOx & Geography IRON ORE CARS COAL

  13. Electro-reduction for Aluminum 2Al2O3 4Al + 3O2 Electrons out Power Plant Electrons in

  14. Hydroelectric Power Aircraft Industry Hydroelectric Power

  15. Why do we recycle aluminum?

  16. Corrosion 2 Fe  2 Fe+2 + 4 e- 4e- + 2H2O + O2  4OH- Electrons travel down nail

  17. Batteries! What if we could trap those electrons, make ‘em do some work before the reduction step?

  18. ENR vs XOM

  19. Fuel Cells—Quick Intro

  20. We are reliant on foreign oil. http://www.worldfuturefund.org/wffmaster/Charts-HTML/Energy/us-oil.htm U.S. oil imports as a percentage of consumption

  21. http://www.saudi-us-relations.org/newsletter/saudi-relations-12.htmlhttp://www.saudi-us-relations.org/newsletter/saudi-relations-12.html

  22. Los Angeles Solar Parking Slots

  23. At the other end of I-10

  24. Hybrid VehiclesRedOx Chemistry Galore “The car Detroit wants you to believe cannot be built.” But is that fair???

  25. Hybrid Locomotive

  26. Cool Fuel Cell Links How Stuff Works Link: http://science.howstuffworks.com/fuel-cell1.htm http://science.howstuffworks.com/framed.htm?parent=fuel-cell.htm&url=http://education.lanl.gov/resources/h2/gottesfeld/education.html

  27. “Maybe I should invest in fuel cells.”P. Russo, 1999

  28. More Announcements Pick up your HW4 papers!! HW5 due 5 pm—no exceptions. HW5 answers by e-mail Monday evening help session, 5 pm Tuesday 7:30 am Final Exam (300 pts) Remember, only 5” x 7” cheat sheet No-calculator bribe raised to 17% for final.

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