Examples of Chemical Change

Examples of Chemical Change

What is a Chemical Change?

A chemical change is a change of materials into another, new materials with different properties and one or more than one new substances are formed. It results when a substance combines with another to form a new substance (synthesis or either decomposes to form more substances). They are generally irreversible except by further chemical reactions. There are three types of chemical changes namely organic, inorganic and biochemical change.

Examples of Chemical Change in Everyday Life

Chemical changes happen around us all the time and not just in a chemistry lab. Some examples of chemical change in our everyday life are mentioned below.

  • Burning of paper and log of wood
  • Digestion of food
  • Boiling an egg
  • Chemical battery usage
  • Electroplating a metal
  • Baking a cake
  • Milk going sour
  • Various metabolic reactions that take place in the cells
  • Rotting of fruits
  • Decomposition of waste
  • The explosion of fireworks
  • The reaction between salts and acids.
  • Rusting of iron
  • Lightening a matchstick

Chemical Changes Involving Organic Compounds

Organic Compounds are complex compounds of carbon in which one or more number of atoms are covalently linked to atoms of other elements. Some of the examples for chemical change involving organic compounds are stated below.

Burning of a Natural Gas

This is a clear example of a combustion reaction. Natural gas comprehends methane gas. When methane reacts with oxygen in the atmosphere it produces water and carbon dioxide. Hence it is an example of chemical change.

Ripening of Fruits

It involves a series of changes. Fruits consist of ethylene. There is an increase in ethylene production when a fruit gets damaged or when it is plucked. This results in the production of new enzymes which in turn reacts with the chemical present on the fruit. So the fruit may witness several changes. Some changes are mentioned below.

  • The fruit becomes more juicy and soft.
  • Due to the breakdown of chlorophyll, the outer skin of fruit changes its color.
  • Tdiffersiffer, i.e it changes from sour to sweet.
  • Aroma is emitted from a ripe fruit.

Chemical Changes Involving Inorganic Compounds

The reactions of compounds and elements that do not involve carbon are the chemical changes involving inorganic compounds. Some examples of chemical change that involves inorganic compounds are mentioned below.

Formation of Steel

It is an irreversible process. Steel is formed by the addition of several other elements in definite quantities to iron, the basic element being carbon. This results in the formation of new substances thus considering it has a chemical change. Properties of the newly formed substances are different from that of iron.

Lighting of a Firework

Firework consists of metal nitrates thus constituting to burning compounds. When firework is lit, a combustion takes place leading to the formation of a new substance with the emission of light and heat. Thus it can be considered as a chemical change.

Biochemical Changes

it deals with the chemistry of the activity and the growth of living organisms. An example of biochemical changes is mentioned below.

Photosynthesis

Photosynthesis is a process which is mainly used by plants to convert light energy into chemical energy. It is a chemical process that occurs in plants. In this process, plants convert water and carbon dioxide into sugars and oxygen.

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Practise This Question

Statement 1:
Every spontaneous redox reaction can be used as the basis of an electrochemical cell, yet every such electrochemical cell is not suitable for commercial purposes.
 
Statement 2: Electrochemical cells using salt bridges have high internal resistance and they lack the compactness and ruggedness for portability.