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On what basis does the acid correction is measured in bomb calorimeter?

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On what basis does the acid correction is measured in bomb calorimeter?

(a) Gases present in the bomb

(b) Due to formation of the compound after adding water in the bomb

(c) Due to the presence of excess oxygen

(d) Due to the material of the bomb

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I'm obligated to ask this question of Determination of Calorific Value of Solid and Non-Volatile Liquid Fuels topic in division Fuels and Combustion of Engineering Chemistry II

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Right choice is (b) Due to formation of the compound after adding water in the bomb

Explanation: When water is added to the bomb, the gases present in it forms acid, due to which some heat is liberated which is not obtainable in practical use, thus this heat liberated has to be deducted from the value so as to get the exact value of GCV.

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