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Bond Energy Simplified Revision Notes for A-Level AQA Chemistry
Revision notes with simplified explanations to understand Bond Energy quickly and effectively.
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1.6.1 Bond Energy
What is Bond Energy?
Bond energy (also known as bond enthalpy or bond dissociation energy) is the amount of energy required to break one mole of a specific bond in a molecule in its gaseous state. It is a measure of bond strength in a chemical bond. Bond energies are typically expressed in kilojoules per mole (kJ/mol).
In any chemical reaction, bonds in the reactants are broken, and new bonds are formed to produce the products. Breaking bonds requires energy, while forming bonds releases energy.
Key Ideas
- Breaking bonds: Endothermic process (requires energy).
- Forming bonds: Exothermic process (releases energy). The overall energy change of a reaction depends on the difference between the energy required to break bonds and the energy released when new bonds form.
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