100 mol of octane is combusted in standard air. The octane is converted (or cons

Question

100 mol of octane is combusted in standard air. The octane is converted (or consumed) completely, but does not undergo complete combustion. How is this possible?

A-This can only happen if the octane is recycled back into the reactor.

B-Some oxygen was left over in the product stream, so the combustion was not technically complete.

C-Some of the octane leaks out of the reactor before it can combust.

D-There is no octane remaining in the product stream, but some of the octane was converted to CO instead of CO2.

E-It's not. This is a trick question. Please stop with the trick questions.

F-The octane was combusted with air, which contains unreactive nitrogen. If it had been combusted with pure oxygen, it would be considered complete combustion.

Explanation / Answer

In the combustion of 100 mol of octane, complete combustion was not observed, even though complete consumption of octane was seen. This could be because,

C. Some of the octane leaks out of the reactor before it can combust.

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