Evaluation:
Published: 20.11.2004.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
  • Essays 'Chemical Reactions', 1.
Extract

Chemical reactions take part in everyday life. Everything from decomposition to chemical reactions in our body, they all take place without our help. In a chemical reaction, some bonds are broken in the reactants in order to form bonds in the products, and atoms are rearranged. Chemical reactions always involve a change in energy. Energy is neither created nor destroyed; it is absorbed or released in chemical reactions. The reactions can be described as endothermic (energy is absorbed) or exothermic (energy is released). …

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