ENDOTHERMIC & EXOTHERMIC REACTIONS!
By Jan Bandachowicz
An Exothermic reaction, is a chemical reaction, meaning it can't be reverted unlike a physical change. This type of reaction gives off heat and light.
The chemical equation for this is : reactants → products + energy
The Self-heating can
The self-heating can, is sort of a more effective and more fun way to make your food. It has two chambers surrounding another. The inner chamber has the food you want to eat. For example, the photo above has tomato soup. The outer chambers have chemicals in them that produce an endothermic reaction. Then, you wait a couple of minutes and then you can eat up!!!! :)
Heat packs and Ice packs
Heat packs, are flexible bags that contain chemicals inside. The chemicals rub against each other to produce heat. This can be applied to a strained muscle or broken bone. This is also called heat therapy. This is an exothermic reaction. There is the opposite, cold therapy. This happens in an ice pack. There is an endothermic reaction. You can find ice packs at school. If you injure yourself, you are given an ice pack already broken up meaning the chemicals have reacted and it is now very cold.
Hand warmers are small (mostly disposable) packets, They release heat because of an exothermic reaction has taken place. They are often used in activities outside the house such as hiking and skiing. For the reaction to happen, you need reactants. In hand warmers we can find "cellulose, iron, water, activated carbon, vermiculite and salt and produce heat from the exothermic oxidation of iron."(wikipedia)