TYPES OF CHEMICAL REACTIONS

TYPES OF CHEMICAL REACTIONS equal in the given equation. On balancing the number of atoms, the following equation can be obtained: CH + 2O → CO + 2H O Further, the chemical equation provides information on the physical state of the substances and the conditions under which the reaction takes place. CH (g) + 2O (g) → CO (g) + 2H O (g) Methane Oxygen Carbon dioxide Water A balanced chemical equation is the simplified representation of a chemical reaction which describes the chemical composition, physical state of the reactants and the products, and the reaction conditions. What happens during a chemical reaction? In a chemical reaction, the atoms of the reacting molecules or elements are rearranged to form new molecules. Old chemical bonds between atoms are broken and new chemical bonds are formed. Bond breaking absorbs energy whereas bond formation releases energy How are chemical reactions represented? When methane reacts with oxygen, it forms carbon dioxide and water. How can you represent this reaction? It can be written as a word equation as shown below: Methane + Oxygen → Carbon dioxide + Water But, this equation does not give the chemical composition of the reactants and products. So, to learn the characteristics of a chemical reaction, it is represented by a chemical equation. In the chemical equation, the chemicals of the reaction are represented by their chemical formulas.The compounds or elements, which undergo reactions (reactants) are shown to the left of an arrow and the compounds formed (products) are shown to the right of the arrow. The arrow indicates the direction of the reaction. Thus, the aforesaid reaction can be written as follows: CH + O → CO + H O But, this is also an incomplete chemical equation. Because, the law of conservation of matter states that matter cannot be created or destroyed. You cannot create new atoms by a chemical reaction. In contrast, they are rearranged in different ways by a chemical reaction to form a new compound. So,