character: Mr. Patel
topic: Endothermic and Exothermic Reactions
grade: 9
subject: Chemistry
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character: Mr. Patel
topic: Chemical Reactions Overview
grade: 9
subject: Chemistry
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character: Mr. Patel
topic: Thermodynamics in Chemistry
grade: 9
subject: Chemistry
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character: Mr. Patel
topic: Energy Changes in Reactions
grade: 9
subject: Chemistry
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