This topic covers energy changes when reactions occur and when matter changes state
It looks at how these reactions are useful
Success criteria - can you…
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Identify exothermic and endothermic reactions from experiment |
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State what happens in an exothermic reaction |
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State what happens in an endothermic reaction |
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State the energy changes involved when matter changes state |
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Skill: Accurately measure temperatures using a thermometer |
Key words
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Word |
Meaning |
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Conservation of energy |
Energy is not created or destroyed – it transfers from one form to another |
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Chemical energy |
Potential energy stored in chemicals |
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Exothermic change |
Transfers heat energy to the surroundings |
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Endothermic change |
Transfers heat energy from the surroundings |
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Combustion |
Burning |
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Burning |
Chemical reaction in which a substance reacts quickly with oxygen and gives out light and heat |
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Thermal decomposition |
Chemical reaction in which a compound breaks down when heated |