Announcements Tuesday, May 3 FINAL When: Tuesday, May 10, 7:30 – 9:30 Where: in our usual room....
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Transcript of Announcements Tuesday, May 3 FINAL When: Tuesday, May 10, 7:30 – 9:30 Where: in our usual room....
AnnouncementsTuesday, May 3
FINALWhen: 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.
Today’s FactoidsPopulation of China: 1,300,000,000
(20% of global population)Population of USA: 300,000,000 Log10(China) = 9.1Log10(USA) = 8.5
U.S. –awarded Ph.D.’s in science & engineering: ~25,000/year
RedOx
Reduction OxidationLose oxygen Gain oxygen
Gain hydrogen Lose hydrogen
Gain electrons Lose electrons
A sample case2Na + 2H2O 2Na+ + H2 +
2OH-
Na was oxidized: Na Na+ + e- (electron lost)H was reduced: lost oxygenO no change: lost H but gained e-
Remember…we actually ran this reaction by dumping some sodium into water.
Still another one (related to “butter vs. margarine”)
CH3CH2CH2CH=CHCH2CH3 + H2
CH3CH2CH2CH-CHCH2CH3 H H
C ?????H ?????
Secret Agents: all part of the semantics nightmare that is
RedOxSomething that promotes reduction: reducing agent
Example: K, Na, H, LiAlH4
Something that promotes oxidation: oxidizing agent
Example, O, F, Br, K2Cr2O7
And the sons of Pullman 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
Steel!
Reducing Iron Ore to Make Steel:
from rust to riches
2 Fe2O3 + 3C 4 Fe + 3CO2
Rusti.e., ore
FromCoal
How steel is really made: http://www.sidmar.be/CONTENT/2c.htm
Batteries! What if we could trap those electrons, make
‘em do some work before the reduction step?
We are reliant on foreign oil. http://www.worldfuturefund.org/wffmaster/Charts-HTML/Energy/u
s-oil.htm
U.S. oilimports as a percentageof consumption
Hybrid VehiclesRedOx Chemistry Galore
“The car Detroit wants you to believe cannot be built.”But is that fair???
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