chickengold92
Posts : 267
Join date : 2010-11-15
 |  Subject: Chemical reaction  Sat Jan 15, 2011 5:05 am | |
| A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.[1] Chemical reactions can be either spontaneous, requiring no input of energy, or non-spontaneous, often coming about only after the input of some type of energy, viz. heat, light or electricity. Classically, chemical reactions encompass changes that strictly involve the motion of electrons in the forming and breaking of chemical bonds, although the general concept of a chemical reaction, in particular the notion of a chemical equation, is applicable to transformations of elementary particles, as well as nuclear reactions. Medical Marijuana DispensariesGrasscroft Self Catering Cottage | |
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