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MHT CET Chemistry question

ChemistryThermodynamicsMHT CET

Heat of formation of , and are , and kcal respectively. The heat of combustion of methane is

Answer: (A)

Solution

CH4 + 2O2 -> CO2 + 2H2O(l): = [-94.0 + 2(-68.4)] - (-17.9) = -230.8 + 17.9 = -212.9

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Question ID VK-064485