Haganum Study guides, Class notes & Summaries

A cold pack is a small plastic sac filled with water, refrigerant gel or other liquids. In this article we only focus on the water variant. This is a instant cold pack that refrigerates by chemical reaction. It contains two bags. One bag has water inside another bag that contains salts like ammonium nitrate, calcium ammonium nitrate or urea. Other salts like potassium bromide, like we’ve used in this inquiry, could also be used. An endothermic reaction will cause the solid part to dissolve whe...