BRAINCAKEThe Enthalpy Change of Combustion
The standard enthalpy change of combustion is defined as: The enthalpy change when one mole of a substance in its standard state burns completely in oxygen under standard conditions of 298K and 100kPa pressure.
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Key terms in this lesson
- Mole
- The amount of substance that contains as many particles as there are atoms in exactly 12g of carbon-12.
- Enthalpy
- A measure of the heat energy stored in a chemical system.
- Enthalpy change
- The heat energy transferred between the system and its surroundings during a process carried out at constant pressure.
- Standard conditions
- A pressure of 100 kPa, a temperature of 298 K, and, for solutions, a concentration of 1 moldm-3.
More in Energetics
- Displacement Reactions
- Allowing for Heat Loss
- Hess's Law and Thermochemical Cycles
- The Enthalpy Change of Formation
- Thermochemical Cycles and Enthalpy Diagrams
- Bond Enthalpies
- Using Mean Bond Enthalpies to Calculate Enthalpy Change
- Comparison with Thermochemical Cycles
All 24 lessons in Energetics · All AQA AS-level Chemistry topics