What role has the energy in chemical reactions?
Chemical reactions produce energy, sometimes they detach* energy and others, they absorb it. 8. What was the origin of that energy? Every atom or molecule of any substance has a chemical energy or an internal characteristic. Therefore, the re-actives have a special internal energy and the products another. 9. Why does energy is detached? If in a chemical reaction, the internal energy is reduced, then it is said that it detaches energy. 10. Why does energy is absorbed? If in a chemical reaction the internal energy increases, then it is said that energy is absorbed. 11. How is show this detached or absorbed energy? It is show by light, electrical…energy. But its most original form is heat, called heat reaction. 12. How can be chemical reactions classified? They can be classified into exothermic*, if there’s heat detachment. And endothermic*, if there’s heat absorption. 13. What is a chemical reaction? It is a process in which one or more substances are changed chemically into other dif
