character: Mr. Thompson
topic: Energy Changes in Reactions
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Chemical Reactions and Energy
grade: 9
subject: Chemistry
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character: Dr. Kim
topic: Thermodynamics in Chemistry
grade: 9
subject: Chemistry
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character: Mr. Carter
topic: Endothermic and Exothermic Reactions
grade: 9
subject: Chemistry
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