Download Lecture 12

M E 433
Professor John M. Cimbala
Today, we will:
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Continue our discussion of lapse rate and atmospheric stability
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Show slides from PSU Visible Emissions Course (Meteorology portion)
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Begin to discuss gradient diffusion
Lecture 12
Example: Review for Quiz 2 (basic chemistry and conversions)
Given: We know that we emit carbon dioxide into the atmosphere when we drive our cars.
Approximate gasoline as mostly octane, C8H18. The molecular weight of gasoline is about
110 kg/kmol and its specific gravity is about 0.75. The molecular weight of CO2 is about
44.0 kg/kmol.
To do: Approximating the combustion of gasoline as ideal combustion of octane, estimate
how many kg of CO2 you emit into the atmosphere for every gallon of gasoline you burn.
Solution: This conversion factor is useful: 1 m3 = 264.17 gallons.