Hot and Cold Packs

Making Hot Packs and Cold Packs

Topics: Temperature and Heat Transfer
In this activity, students explore heat transfer and temperature by considering the design of hot and cold packs used to treat minor injuries. In the virtual lab, students evaluate substances by comparing their change in temperature when added to water. Students investigate kinetic energy at the molecular level and connect heat transfer to transfer of kinetic energy between systems. Throughout, students learn that endothermic and exothermic reactions are linked to the design of hot and cold packs.