It is considered that a structure made a chemical change when it has decomposed its structure assembling in a different order from the original structure to create a new chemical compound with different properties from the initial compound. All this change occurs in the presence of an energy factor; the new chemical product can be given the name of "chemical element" when the formation of atoms occurs or it is called as "chemical compound" if its transformation consists of the union or fusion of two or more elements.
An example of to facilitate the understanding of this concept can refer to the formation of oxide, this chemical compound is nothing more than the union between iron and oxygen, among the types of chemical changes the following stand out:
- Combustion: it is the interaction between oxygen and any fuel (substance that can give combustion with only a previous heating), which gives rise to a transformation of the structure of the matter while generating light and heat, to achieve combustion it is necessary that three important factors interact such as fuel (material that catches fire), ignition temperature (the minimum temperature necessary to start combustion) and the oxidizer (material that starts combustion).
- Fermentation: unlike combustion, it is a process that occurs in anaerobic properties (without the presence of oxygen) resulting in an organic compound different from the initial one; As it has the anaerobic characteristic, organelles of the cells such as the mitochondria do not work, nor is the respiratory cycle or the krebs cycle followed in the event that we are talking about the lactic fermentation process that occurs at the level of muscle contraction; This chemical change in most cases is produced by microorganisms such as bacteria and fungi.
Chemical changes in matter can sometimes be identified by just using observation, since these changes in turn generate physical changes in matter such as color or odor changes, chemical changes are not always given at the same time intervals, the decomposition and recomposition of matter sometimes occur slowly, such as the oxidation of an iron material, as well as the alteration of the chemical structure can happen with less use of time, such as combustion of a paper.
