delocalisation energy
What delocalisation energy means in Chemistry A-Level, as defined for AQA.
Definitions of delocalisation energy
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Reference: AQA
The difference between the predicted enthalpy of hydrogenation, calculated as three times the cyclohexene value, and the measured value.
The gap by which benzene is about 152 kJ mol⁻¹ more stable than the model predicts, because it started at a lower energy.
Topics that use delocalisation energy
- Bonding (A-level only) (AQA A-Level)
Related terms
- bromine water test
- delocalisation
- energy of products
- equal bond lengths
- relative stability
- substitution over addition
- enthalpy of hydrogenation
- Kekulé model
Using delocalisation energy in the exam
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