character: Prof. Johnson
topic: Chemical Properties of Refrigerants
grade: 12
subject: Chemistry
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character: Dr. Smith
topic: Thermodynamic Principles in Refrigeration
grade: 12
subject: Chemistry
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character: Ms. Davis
topic: Environmental Impact of Refrigerants
grade: 12
subject: Chemistry
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character: Mr. Lee
topic: Alternative Refrigerants and Their Properties
grade: 12
subject: Chemistry
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