CHEM 304 – 3/16/12
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Transcript of CHEM 304 – 3/16/12
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CHEM 304 – 3/16/12 Your “Personal Carbon Footprint”
Assignment- Chemical Mass & Energy Balance- Some specifics
Exam #1 Average =
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For methane combustion:
CH4 + 2 O2 —> 2 H2O + CO2
If 1000 g of CH4 are burned:
i) How many grams of H2O are produced? ii) How many grams of CO2 are produced?
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For methane combustion:
CH4 + 2 O2 —> 2 H2O + CO2 + 890 kJ
If 1000 kg (1 metric ton) of CH4 is burned, how much heat (energy) is produced?
How many grams of CH4 is burned if 105 megajoules (105 x 106 J)* of energy are produced? How much CO2?
*(this is 1 “THERM” – the unit on a utility bill!)
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Converting to kJ (per day) or g (per day)
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• http://www.fueleconomy.gov/
• Dr Jim drives ~ 150 miles per week
(100 w/out kids, 200 w/ kids …)
• 1997 Subaru legacy wagon: