Question

what is calorific value​

Answer 1

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The amount of energy produced by the complete combustion of a material or fuel. Measured in units of energy per amount of material, e.g. kJ/kg. The amount of energy available from an item of food when digested, mostly from carbohydrates and fats.

Answer 2

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Calorific value is the amount of heat energy released during complete combustion of 1 Kg of a fuel.

It is expressed in Kilo Joule per Kg (KJ/Kg).