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Exothermic Reaction. Chemical process in which system evolves resulting in heat transfer to the surroundings. Endothermic Reaction: Chemical process in which system evolves resulting in heat transfer to the system. A. Burning wood in a campfire. Which of the following processes is endothermic? A. Burning wood in a campfire. B. A chemical "icebag" used to treat a sports injury. C. Making ice from water. D. The condensation of a gas.

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