Question

On burning completely 2.5 kg of a fuel produces 87500 kJ of heat energy. The calorific value of the fuel is –

• A. 35,000 kg/kJ
• B. 35,000 kJ/kg
• C. 35,000 J/kg
• D. 35,000 g/J

Answer 1

The correct option is B 35,000 kJ/kg

Calorific value is measured as the amount of heat produced by burning 1 kg of fuel. It is expressed as kJ/kg.

2.5 kg produces heat = 87500 kJ
1 kg of fuel will produce = $\frac{87500}{2.5}$
= 35000 kJ
Hence, the calorific value of the fuel is 35000 kJ/kg.