(Photo credit: mandy&john)
Endothermic and Exothermic Reactions & Processes are commonly observed in our everyday life.
These energy changes are either occurring naturally (combustion/burning, photosynthesis, respiration, boiling, freezing, etc) or being employed by mankind to make our lives better through its numerous application.
One of the most common application is the use of Cold Packs in our daily lives.
When you have a headache, applying a cold pack relieve the pain. Most of the commercially available cold packs contain chemicals which take in heat when they react. This is why cold packs causes a cooling effect on their person’s head and temporarily relieve the pain.
Chemistry Concepts behind the Use of Cold Packs:
What really happens is that when the cold pack is used, the chemicals inside the pack are made to react with each other and this reaction (i call this the SYSTEM) is highly Endothermic in nature – heat energy is taken into the SYSTEM from the SURROUNDING. The SURROUNDING in this case is the [Read more…] about Chemistry Phenomenon: Endothermic / Exothermic Reactions in Everyday Life