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  • 1)Another example of an endothermic reaction is seen with the cold packs used by athletes to treat injuries. These packs usually consist of a plastic bag containing ammonium nitrate dissolves in the water.
  • 2)A reaction that needs some type of energy to make it go is said to be endothermic. It takes in energy.
  • 3)When it is mixed with water in your mouth, an endothermic reaction occurs, taking heat energy from your mouth and making it feel cooler.
  • 4)For example, the sherbet you used for the chapter problem on page 25 is a mixture of baking soda and citric acid.
  • 5)This process is endothermic-taking heat energy from the surroundings and cooling the injured part of your body. In this way, the cold pack acts as an ice pack.