Chemistry How are hot packs examples of exothermic processes? Asked by arwen46 12 years ago 7/24/2013 5:19 AM Last updated by anonymous 12 years ago 7/26/2013 2:03 AM
Hot packs often contain a capsule of calcium chloride (CaCl2) surrounded by water. When you break the capsule, the calcium chloride dissolves in the water. Then the temperature of the water (surroundings) increases as heat is released.
