Question

In a experiment 4. 5 kg of a fuel was completely burnt .the heat produced was measured to be 280000 kj . calculate the calorific value of fuel .

Answer 1

Calorific value= total energy released/total mass of fuel
=280000/4.5
=62222.2222.......

Answer 2

Answer:

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.

or,

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

Heat produced by 5 kg of fuel = 200000 kJ.

Heat produced by 1 kg fuel =

Heat/ kg

so = 5 / 200000

=40000 kJ/kg.

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

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