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Cold packs are often used to prevent swelling of certain athletic injuries. The pack contains ammonium nitrate and water in separate compartments. When the pack is squeezed, the partition breaks mixing the components and forming a solution that turns very cold.
Below is the reaction:
NH₄NO₃(s) → NH⁺⁴ (aq) + NO₃⁻ (aq)
Based on the information above, is the reaction endothermic or exothermic?
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