# Is the CO amount I found correct?

1. Feb 10, 2015

### chemman218

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
PV=nrt

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

PV=nRT
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. Feb 10, 2015

### Staff: Mentor

Yes, assuming that those 80 m^3/min are specifically referenced to 1 atm and 298K.

Chet

3. Feb 10, 2015

### chemman218

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!

4. Feb 10, 2015

### Staff: Mentor

Isn't STP 1 atm and 0 C?

Chet

5. Feb 10, 2015

### chemman218

Yes you are correct, but our teacher told us to use 298K.

6. Feb 10, 2015

### Staff: Mentor

Shouldn't that be 0.08 m3/min if it's 0.1% of 80 m3/min?

7. Feb 10, 2015

### chemman218

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!