Energy and changes of state
What Energy and changes of state means in Combined Science GCSE, as defined for AQA.
Definitions of Energy and changes of state
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Reference: AQA
The amount of energy needed to change state from solid to liquid and from liquid to gas depends on the strength of the forces between the particles of the substance.
More energy is needed to overcome intermolecular forces when the substance melts or boils, while the covalent bonds within each molecule remain intact.
Topics that use Energy and changes of state
- Properties of small molecules (AQA GCSE)
- The three states of matter (AQA GCSE)
Related terms
- Intermolecular forces
- Melting and boiling points
- States of matter
- Boiling point
- Bonding and structure
- Changes of state
- Changes of state and energy transfer
- Comparing temperature with fixed points
Using Energy and changes of state in the exam
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