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When the coal is completely burnt in air, then the maximum temperature reached is called _________

(a) calorific value of coal

(b) gross calorific value

(c) calorific intensity of coal

(d) net calorific value

The question was posed to me in class test.

Enquiry is from Calorific Value topic in section Fuel Technologies of Applied Chemistry

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Right answer is (c) calorific intensity of coal

Explanation: Calorific value of coal is defined as the amount of heat liberated during combustion of fuel completely. Gross calorific value or HCV means the total heat liberated after combustion of fuel and products must be cooled. Net calorific value is the total heat liberated after combustion of fuel and products are allowed to escape. So, the maximum temperature reached is calorific intensity of coal.

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