Ifyoudontlikehavingoneandahalfoxygenmoleculesyoucanthinkoftwohydrocarbonsplusthr

# Ifyoudontlikehavingoneandahalfoxygenmoleculesyoucanthinkoftw...

This preview shows page 2 - 4 out of 4 pages.

(Ifyoudon’tlikehavingone­and­a­halfoxygenmolecules,youcanthinkoftwohydrocarbonsplusthree oxygensmakingtwocarbondioxidesandtwowaters;itisthesamething,really.) In burning, each carbon atom, C, in gasoline eliminates two hydrogens and replaces them with two oxygens each carbon atom weighs 12 atomic mass units each hydrogen weighs 1 each oxygen weighs 16; So, CH2 starts out weighing 14 (12 from carbon and 2 from hydrogen), and CO2 ends up weighing 44 (12 from carbon and 32 from oxygen)—the weight has more than tripled. Rounding that off a little, thetotalweightofCO2putoutbyatypicalU.S.driveristhreetimeslargerthanthe weightofgasolineburned. To get the number of pounds of CO2 per year from a typical car, then, multiply your answer from the previous question by 3. A) 216,000 pounds / year B) 1,080 pounds / year C) 108,000 pounds / year D) 10,800 pounds / year 4. Total Pounds (or Tons) of CO 2 Produced by U.S. Drivers per Year Calculation: Imagine for a moment that the CO 2 behaved like horse ploppies, making a pile in the road, rather than wafting away in the atmosphere. How much would we have? Here are your necessary facts: There are roughly 140,000,000 cars in the country Each car averages 12,000 miles per year Each car is producing @ 1 pound of CO 2 per car per mile How many pounds of CO 2 are produced each year by U.S. drivers? To get this number, simply multiply the 3 variables above for this answer. This is a big number ­ one that cheaper calculators won't be able to handle. In this case, you'll want to come up with the number of tons instead of the number of pounds of CO 2 . (2000 lbs = 1 ton). The formulas will look like this; Points Earned: 2.0/2.0 Correct Answer(s): D
11/8/2016 Exercise #6: Fossil Fuels (& Driving Hazards) 3/4 Total Pounds of CO 2 produced in a year by U.S. drivers: # of cars X # of miles per car X pounds of CO 2 per mile Total Tons of CO 2 produced in a year by U.S. drivers:(# of cars / 2000) X # of miles per car X pounds of CO 2 per mile

#### You've reached the end of your free preview.

Want to read all 4 pages?

• Fall '08
• ALLEY,RICHARDBANANDAKRISHNAN,SR
• CO2, Geosc10, Geosc010, Exercise 6, pounds