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Academics – Applied Heat : 2017/JUL/03
Question

Q3. A fuel of mass analysis 84% carbon and 16% hydrogen is completely burned in air.

The dry fuel gas analysis shows that they contain 14%  by volume.

(a) Determine the air supply in molar volumes for 100 kg of fuel. (8)

(b) Calculate EACH of the following:

(i) the air fuel ratio by mass; (4)

(ii) the percentage excess air by volume. (4)

Note: Relative atomic mosses H =1, C =12, N =14, O =16

Air contains 21% oxygen by volume.

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