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

Explanation

Calorific value of fuels
`=("Total heat produced (in kilo joules)")/("Total mass burnt (in kg)")`
Here, mass of the fuel = 4.5 kg, heat produced
= 180, 000 kJ
`:.` Calorific value of the fuel used in the experiment
`=(180,000 kJ)/(4.5kg) =(180,000 xx 10)/(45)`kJ per kg
= 40,000 kJ per kg