Standard enthalpy change of combustion

Standard enthalpy change of combustion

The standard enthalpy of combustion is the enthalpy change when one mole of a substance completely reacts with oxygen under standard thermodynamic conditions (although experimental values are usually obtained under different conditions and subsequently adjusted). By definition, combustion reactions are generally strongly exothermic and so enthalpies of combustion are generally strongly negative.

It is commonly denoted as Delta H ^{circ} _{mathrm{comb or Delta H ^{circ}_{mathrm{c

Enthalpies of combustion are typically measured using bomb calorimetry, and have units of energy (typically kJ); strictly speaking, the enthalpy change per mole of substance combusted is the standard "molar" enthalpy of combustion (which typically would have units of kJ mol−1).

External links

* [http://webbook.nist.gov/chemistry/ NIST Chemistry WebBook]


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