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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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.
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
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.
2 CH3OH 2 CH2O + H2
CH3CH2CH2CH=CHCH2CH3 + H2
HStill another one (related to “butter vs. margarine”)
Recovery of metals from ores
Prevention of corrosion
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
2 Fe2O3 + 3C 4 Fe + 3CO2
How steel is really made: http://www.sidmar.be/CONTENT/2c.htm
2Al2O3 4Al + 3O2
2 Fe 2 Fe+2 + 4 e-
4e- + 2H2O + O2 4OH-
Electrons travel down nail
as a percentage
“The car Detroit wants you to believe cannot be built.”
But is that fair???
How Stuff Works Link:
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.