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Q3. A pure hydrocarbon fuel is burned in air. The volumetric analysis of the dry exhaust gives 10.5 % CO₂, 1% CO, and 7.4% O₂. Calculate EACH of the following for 100 kmols of dry exhaust gas:

(a) The complete equation of combustion by volume;(6)

(b) The mass analysis of the fuel;(3)

(c) The air to fuel ratio by mass;(3)

(d) The mass fraction of the total exhaust gas.(4)

Note: Atomic mass relationships: H = 1, C = 12, N = 14, O = 16

Air contains 21% oxygen by volume.

Molecular mass of air = 28.96 kg/ kmol