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Is the CO amount I found correct?

  1. Feb 10, 2015 #1
    1. The problem statement, all variables and given/known data
    An automobile traveling 50 Km/hr emits 0.1% CO from the exhaust. If the exhaust rate is 80 m^3/min, what is the CO emission in grams per kilometer?

    2. Relevant equations

    3. The attempt at a solution
    flow rate volume of CO =(.8m^3/min)8(1min/.833km)=.960m^3/km*(1000L/1m^3)=960 L/km

    n=((1atm)(960L/km))/((.08206 L*atm/mol*k)*(298K))=39.25 moles/km of CO
    39.25moles/km * 28g/mole of CO = 1099.65 g/km
  2. jcsd
  3. Feb 10, 2015 #2
    Yes, assuming that those 80 m^3/min are specifically referenced to 1 atm and 298K.

  4. Feb 10, 2015 #3
    Yes, it is at STP. I was trying to search the internet for reference on CO levels from automobiles to see if the number I got was correct but could not find anything. Thank you for your help!
  5. Feb 10, 2015 #4
    Isn't STP 1 atm and 0 C?

  6. Feb 10, 2015 #5
    Yes you are correct, but our teacher told us to use 298K.
  7. Feb 10, 2015 #6


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    Staff: Mentor

    Shouldn't that be 0.08 m3/min if it's 0.1% of 80 m3/min?
  8. Feb 10, 2015 #7
    Thank you for the catch. I used the wrong percent to multiply. I used .01 instead of .001. Thank you so much for all your help!
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