character: Student C
topic: Energy Changes in Chemical Reactions
grade: 9
subject: Chemistry
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character: Student D
topic: Exothermic and Endothermic Reactions
grade: 9
subject: Chemistry
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character: Student A
topic: Activation Energy and Catalysts
grade: 9
subject: Chemistry
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character: Student B
topic: Thermochemistry and Heat Transfer
grade: 9
subject: Chemistry
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