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MCQ
What is the standard enthalpy of combustion of a substance?
Chemistry
A Enthalpy when 1 mole burns in excess oxygen at standard conditions
B Enthalpy when all moles burn completely
C Enthalpy of formation of combustion products
D Enthalpy per gram of fuel burned
Explanation

Standard enthalpy of combustion is the enthalpy change when 1 mole of a substance undergoes complete combustion in excess O2 under standard conditions (298 K, 1 atm).

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