Chemistry / Chem 0694 · Atom · ~20 seconds
Standard Enthalpy of Combustion
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A standard enthalpy of combustion is the enthalpy change when one mole of a substance burns completely under standard state conditions.
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Ethanol's standard enthalpy of combustion is a large negative value, reflecting the substantial heat released when one mole burns completely.
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A tabulated enthalpy of combustion describes one mole burning completely, not whatever partial amount a real burn consumes.