Question

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Answer 1

Answer:

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Answer 2

Answer:

(a). The calorific value of fuel is the amount of heat produced by the complete combustion of 1 kg of fuel.

Heat produced by 4.5 kg of fuel =180000 kJ.

Heat produced by 1 kg fuel =

4.5

180000

=40000 kJ/kg.

Hence, the calorific value of the fuel is 40,000 kJ/kg.

(b). The conditions required for combustion to take place are:

1. Presence of a fuel

2. Air (or oxygen)

3. Ignition temperature (minimum temperature at which a substance catches fire).