The fuel supplied to a petrol engine may be assumed to have the formula C,H16 Calculate: (i) the minimum air required for complete combustion of 1 kg of fuel, (ii) the gross calorific value of fuel per kg; and (iii) the percentage of CO2 in the exhaust gases, if the fuel is burned with 30% excess air. Assume that 1 kg of carbon liberates 33,800 kJ forming CO; and 1 kg of hydrogen liberates 1,44,450 k.J forming H,O .

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