Question

In an experiment, 4.5 kg of fuel was completely burnt. The heat produced was measured to be 180,000 kJ. Calculate the calorific value of the fuel. ​

Answer 1

The calorific value of fuel is the amount of heat produced by the complete combustion of 1kg of fuel.
That is
Calorific value
$=\frac{\text{Amount of heat released}}{\text{Mass of fuel burnt}}$
Given , the heat produced by 4.5kg of fuel = 180000kj
$=\frac{180000}{4.5}$
$=40000kj/kg$

Therefore, the calorific value of the fuel is 40,000 kj/kg