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Q16. The mass analysis of a fuel is: carbon 78%; hydrogen 16%; sulphur 3.2%; water 2% (remainder ash). Determine EACH of the following:

(a) The theoretical air/fuel ratio by mass; (6)

(b) The volumetric analysis of the dry products (i.e excluding H₂O and soluble SO₂) when the fuel is burned completely in 30% excess air; (6)

(c) The dew point temperature of the combustion products if the total pressure is 1.03 bar. (4)

Note: Atomic mass relationships: H = 1; C = 12; O = 16; N = 14; S = 32

Air contains 21% oxygen by volume and 23.3% oxygen by mass.