Module 4 | Energy
Focus 4: Combustion provides another opportunity to examine the conditions under which chemical reactions occur
Lesson 1 | Energy profiles of chemical change
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Describe the indicators of chemical reactions.
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Outline the changes in molecules during chemical reactions in terms of bond-breaking and bond-making.
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Explain that energy is required to break bonds and energy is released when bonds are formed.
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Describe the energy needed to begin a chemical reaction as activation energy.
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Describe the energy profile diagram for both endothermic and exothermic reactions.
Lesson 2 | Endothermic and exothermic reactions
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Perform first-hand investigations to observe and describe examples of endothermic and exothermic chemical reactions.
Lesson 3 | Investigating combustion reactions
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Solve problems and perform a first-hand investigation to measure the change in mass when a mixture such as wood is burned in an open container.
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Identify the changes of state involved in combustion of a burning candle.
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Describe chemical reactions by using full balanced chemical equations to summarise examples of complete and incomplete combustion.
Lesson 4 | Combustion of organic compounds
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Identify the sources of pollution which accompany the combustion of organic compounds and explain how these can be avoided
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Explain the relationship between ignition temperature and activation energy
