Endothermic reactions are cold, absorbing heat from the surrounds.
It is made from 2 solid materials and water under the two mix the 2 substances. the cheimal change happens and makes the cup or water freeze because it is aborbing heat and releasing a cold breeze. It's like an ice pack you squeeze or pull on the handle and instantly becomes ÎCE and is an Ice pack.
It is a chemal change because 2 solid materials became water and ice.
2. This will affect us in the future greatly because then we are away or far away from a nurse or hospital we can have a pocket icepack and can instantly freeze up so we can heal or freeze our wound or bruse. you can bring the ice pack where ever you are. It's affecting the world today because nurses doesn't have to put an ice pack in a freezer and wait for it to freeze to put on a patient they can just use the instant freeze icepack from Endotherimic reaction making it freeze fast to put on patients who need it most and fast.
4.http://discoveryexpress.weebly.com/homeblog/exothermic-vs-endothermic-chemistrys-give-and-take
