Discussion
Gas at \( 40 \) degrees expands on heating to \( 800 \) degrees. Taking absolute temperatures, the volumetric flow rises by a factor of about
Answer: B
The ratio is \( 1073/313 = 3.43 \). Sizing an oxidiser chamber on the cold flow would make it less than a third of the volume actually needed, and the residence time would fall well short of what the reaction requires.
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