Revision on reversible and irreversible change.

 Reversible and irreversible change

The only constant in our environment is change. Both living things and non-living objects can undergo changes. The changes that take place in our environment can occasionally be reversible and occasionally irreversible. In simple, we can define reversible change as the change that can be reversed or undone whereas irreversible change can be defined as the change that cannot be reversed or undone.

A reversible change refers to anything that can occur backward, that is, it can be reversed. Reversible changes occurs when the physical or chemical properties of a substance are altered, but the substance remains the same. For example, melting of ice is a reversible change because the ice can be refrozen and return to its original state. 

                                               Figure 1: Melting of ice

Similarly, boiling of water can  is a reversible change because the water can be cooled and return to its liquid state. 

             Figure 2: Boiling water

An irreversible change refers to the change that cannot be undone, that is, it cannot be reversed. Irreversible changes occurs when the physical and chemical properties of substance are permanently altered, resulting in a new substance. 

For example, burning woods is an irreversible change because the wood is transformed into ash and cannot be returned to its original state.

       Figure 3: Burning woods

Another example could be the boiling of egg as the egg is transformed into solid state and cannot be returned to its liquid state.

                                                                                                                Figure 4: Boiling eggs

To conclude, reversible and irreversible change are the changes that we face in our real life. Reversible change are the changes that can be reversed or can return back to its initial state. And irreversible change are the changes that cannot be reversed or cannot return back to its initial state. 

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