character: Mr. Lee
topic: Energy Changes in Reactions
grade: 9
subject: Chemistry
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character: Ms. Carter
topic: Thermodynamics in Chemistry
grade: 9
subject: Chemistry
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character: Mr. Davis
topic: Endothermic and Exothermic Reactions
grade: 9
subject: Chemistry
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character: Dr. Chen
topic: Activation Energy and Reaction Rates
grade: 9
subject: Chemistry
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