Energy Changes: Bond Breaking and Making
Students will qualitatively explain how the balance between energy absorbed for bond breaking and energy released for bond making determines if a reaction is exothermic or endothermic.
Key Questions
- Explain that energy is absorbed to break bonds and released when new bonds are formed.
- Relate the overall energy change of a reaction to the relative strengths of bonds broken and formed.
- Predict whether a reaction will be exothermic or endothermic based on a qualitative comparison of bond energy changes.
National Curriculum Attainment Targets
Suggested Methodologies
Ready to teach this topic?
Generate a complete, classroom-ready active learning mission in seconds.
Planning templates for Chemistry
More in Chemical Changes and Extraction
Oxidation and Reduction: Electron Transfer (OIL RIG)
Students will define oxidation and reduction in terms of electron loss or gain using the OIL RIG mnemonic.
2 methodologies
Electrolysis of Molten Ionic Compounds
Students will understand the process of electrolysis for molten ionic compounds, focusing on electrode reactions.
2 methodologies
Electrolysis of Aqueous Solutions
Students will investigate the electrolysis of aqueous solutions, considering the discharge of water components.
2 methodologies
Extraction of Aluminium by Electrolysis
Students will study the industrial extraction of aluminium, including the role of cryolite and environmental considerations.
2 methodologies
Exothermic Reactions
Students will identify and describe exothermic reactions, relating them to energy release and temperature increase.
2 methodologies