BRAINCAKEComparison with Thermochemical Cycles
There are limitations to using mean bond enthalpies to calculate enthalpy changes.
The actual energy involved in breaking and forming the individual bonds will be different from the average bond enthalpies given in the data book, since these have been calculated in different chemical environments.
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Key terms in this lesson
- Enthalpy
- A measure of the heat energy stored in a chemical system.
- Average bond enthalpy
- The energy required to break one mole of a specified type of bond in a gaseous molecule, averaged over many different molecules.
More in Energetics
- The Enthalpy Change of Combustion
- Thermochemical Cycles and Enthalpy Diagrams
- Bond Enthalpies
- Using Mean Bond Enthalpies to Calculate Enthalpy Change
- Example Question - 1
- Example Question - 2
- Example Question - 3
- Example Question - 4
All 24 lessons in Energetics · All AQA AS-level Chemistry topics