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OpenStudy (anonymous):
Cold packs are designed to become very cold when activated. When the pack is activated, a chemical reaction occurs to make the temperature of the cold pack decrease. What must be true of this chemical reaction? A. The reaction releases energy to its surroundings. B. The products and reactants have the same amount of energy. C. The products have less energy than the reactants. D. The reaction absorbs energy from its surroundings.
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OpenStudy (anonymous):
C i think
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