From: John Mullen

"M. J. Powell" wrote in

In message , Clark
writes


Do your homework Mike and you will be able to answer your question.

I asked because I don't want to do more homework!


So, how's that working out for ya?


Assume jet fuel is pure decane, to simplify the calculation.

C10H22 + 15.5O2 - 11H20 + 10CO2

1 mole C10H22 = 142g
1 mole H2O = 18g
1 mole CO2 = 44g

So for every tonne (1000kg) of decane burned, assuming 100% combustion,
you will have

1000000/142 * 11 * 18g = 1394360g = 1394kg water
1000000/142 * 10 * 44 = 3098590g = 3098kg carbon dioxide

Which comes to about 4492kg of products. Where does the extra weight
come from?

Obviously from the oxygen used to burn the fuel, which comes to

1000000/142 * 15.5 * 32g = 3492957g = 3492kg

The assumptions made won't have much effect on the calculation, and
neither will rounding error. The biggest error probably comes from the
100% combustion; from the smell they make, most jets give out quite a
bit of unburnt fuel. Right ball park though.

HTH

John

Does PETA know you use moles in chemistry?

Dan, U. S. Air Force, retired