character: Mr. Smith
topic: Energy Changes in Reactions
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Thermodynamics in Chemical Reactions
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Endothermic and Exothermic Reactions
grade: 9
subject: Chemistry
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character: Mr. Adams
topic: Activation Energy and Reaction Rate
grade: 9
subject: Chemistry
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