• An exothermic reaction is a chemical reaction that releases energy through light or heat. 
• An exothermic reaction is the forming of bonds

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C6 Energy Changes in Chemical Reactions

What is an exothermic reaction?

C6. 1 Describe the meaning of exothermic reactions

Energy Exits the reaction as heat, light or sound

C6 Energy Changes in Chemical Reactions

Exothermic Reaction Profile

C6.3 Draw and label energy level diagrams for exothermic reactions using data provided

• An endothermic reaction is a chemical reaction that takes in energy through light or heat. 
• An endothermic reaction is the breaking of bonds

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C6 Energy Changes in Chemical Reactions

C6. 1 Describe the meaning of endothermic reactions C6.2 Describe bond breaking as an endothermic process

Energy Enters the reaction as heat or light

C6 Energy Changes in Chemical Reactions

Endothermic Reaction Profile

C6.3 Draw and label energy level diagrams for endothermic reactions using data provided

• A catalyst is a chemical that speeds (makes faster) up a reaction by lowering the activation energy required.
• A catalyst does not change after it is used
• Catalysts can be very expensive
• Specific catalysts are needed for specific reactions

C6 Energy Changes in Chemical Reactions

What is a catalyst?

Review C7.1.4 Describe the effect of catalysts on the rate of reactions

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C6 Energy Changes in Chemical Reactions

Exothermic or Endothermic?

C6.4 Interpret energy level diagrams showing exothermic and endothermic reactions and the activation energy of a reaction

C6 Energy Changes in Chemical Reactions

What is an endothermic and exothermic reaction?

Checkpoint

C6 Energy Changes in Chemical Reactions

Plan to teach a year 6 lesson on Exothermic and Endothermic reactions

Plenary

C6 Energy Changes in Chemical Reactions

Checkpoint

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