Chemical_Reactions

Chemical Reactions Chemical reactions Chemical reactions are the heart of chemistry. People have always known that they exist. The Ancient Greeks were the firsts to speculate on the composition of matter. They thought that it was possible that individual particles made up matter. From the work of many other chemists, we now have a mostly complete knowledge of chemical reactions. There are now many classification systems to classify the different types of reactions. These include decomposition, synthesis, combustion, single-displacement, and double-displacement. Decomposition reactions are reactions in which a substance breaks into smaller parts. As an example, ammonium carbonate will decompose into ammonia, carbon dioxide, and water. Polymerization reactions are reactions in which simpler substances combine to form a complex substance. The thing that makes this reaction unusual is that the final product is composed of hundreds of the simpler reagent (a substance that contributes to a chemical reaction) species. One example is the polymerization of terephthalic acid with ethylene glycol to form the polymer called Dacron, a fiber, or Mylar, in sheet form: The reaction between iron and chlorine gas is an example of a synthesis reaction. A synthesis reaction is a chemical reaction in which two or more substances react to produce reaction, reactions, between, two, synthesis, à, water, one, double-displacement, another, single-displacement, now, metal, example, compound, combustion, chemical, substance, metals, type, replaces, product, places, oxygen, ions, hydroxide, form, element, combine, substances, replace, react, produce, plants, occurs