character: Student D
topic: Heat Transfer during Chemical Reactions
grade: 9
subject: Chemistry
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character: Student A
topic: Endothermic and Exothermic Reactions
grade: 9
subject: Chemistry
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character: Student B
topic: Thermodynamics in Chemical Processes
grade: 9
subject: Chemistry
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character: Student C
topic: Energy Changes in Chemical Bonds
grade: 9
subject: Chemistry
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