Question

If 3.5 Kg. fuel gives 245000 KJ energy. Calculate the calorific value of the fuel.​

Answer 1

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 = 4.5180000 =40000 kJ/kg.

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

Answer 2

The calorific value of the fuel is 70000 KJ/kg

Explanation:

Given:

3.5 kg fuel gives 245000 KJ of energy

To find out:

The calorific value of the fuel

Solution:

The amount of energy released when 1 kg of fuel burns or any other substance is burnt in the presence of oxygen and the products of combustion are cooled to STP is called calorific value.

The SI unit of Calorific Value is KJ/kg

∵ 3.5 kg fuel gives 245000 KJ of energy

∴ 1 kg fuel gives = 245000/3.5 = 70000 KJ/kg

Therefore, the calorific value of the fuel = 70000 KJ/kg

Hope this answer is helpful.

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