7.2 Chemical Reactions & Energy

What is a Chemical Reaction?

• The process that rearranges the molecules of a substance

• A physical change to a substance (like changing from a solid to a liquid to a gas)

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What is an example of a Chemical Reaction?

• Making Lemonade

• Reheating a Pizza

• Combining Steel Wool & Vinegar

• Melting Ice back into water

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When there is a reaction happening and the system absorbs heat this is an...

• Endothermic Reaction

• Exothermic Reaction

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When there is a reaction happening and the system releases heat this is an...

• Endothermic Reaction

• Exothermic Reaction

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What is this picture showing you?

• Chemical Reaction

• Endothermic Reaction

• Exothermic Reaction

• Particle Model

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This is a diagram is a...?

• Exothermic Reaction

• Endothermic Reaction

• Chemical Reaction

• Particle Model

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This is a diagram of a...?

• Endothermic Reaction

• Exothermic Reaction

• Energy Transfer

• Chemical Reaction

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This is a diagram of a...?

• Endothermic Reaction

• Exothermic Reaction

• Chemical Reaction

• Energy Transfer

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The process where energy is moved from one system to another is what?

• Energy Transfer

• Chemical Reaction

• Particle Model

• Physical Reaction

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This is a diagram of a...?

• Chemical Reaction Model

• Particle Model

• Energy Transfer Model

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