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MHT CET Chemistry question

ChemistryThermodynamicsMHT CET

On combustion, carbon forms two oxides CO and . Heat of formation of is 94.3 kcal and that of CO is 26.0 kcal. Heat of combustion of carbon is

Answer: (B)

Solution

The heat of combustion of carbon refers to complete combustion to , which equals the heat of formation of , i.e. −94.3 kcal;

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Question ID VK-064188