14.1.10

Chemical Bonds

Test yourself

Chemical Bonds

All chemical bonds have a "bond energy" that measures the strength of chemical bonds. By subtracting the total bond energies of the products from the total bond energies of reactants, we can see if a reaction is endothermic or exothermic (energy change in kJ mol-1).

Illustrative background for Exothermic reactionsIllustrative background for Exothermic reactions ?? "content

Exothermic reactions

  • Energy released by forming bonds > energy required to break bonds.
  • I.e. overall energy change of reaction < 0.
Illustrative background for Endothermic reactionsIllustrative background for Endothermic reactions ?? "content

Endothermic reactions

  • Energy released by forming bonds < energy required to break bonds.
  • I.e. overall energy change of reaction > 0.

Jump to other topics

1States of Matter

2Elements, Compounds & Mixtures

3Atomic Structure

4The Periodic Table

5Chemical Formulae, Equations & Calculations

6Bonding

7Electrolysis

8Groups of the Periodic Table

9The Atmosphere

10Reactivity Series

11Metal Extraction

12Acids & Alkalis

13Chemical Tests

14Physical Chemistry

15Organic Chemistry

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