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In chemical sciences, changes can be defined as reversible or irreversible changes. On the basis of change in physical state of matter, it can be physical or chemical change also.
The world is constantly changing. Some of the changes around us are natural, and some are man-made. Do you know that the changes can be identified as either a reversible change or an irreversible change?
Question 1: What is reversible change and irreversible changes?
The changes that form new substances are called irreversible changes as they cannot reverse back to starting material. For example, burning of coal is an example of irreversible change.
The reversible change can make the starting material again like melting of ice is a reversible change.
Question 2: How do you know if a reaction is reversible or irreversible?
A reversible change can be differentiated from an irreversible change as an irreversible change leads to the formation of a certain new substance whereas a reversible change again forms the same starting material.
Question 3: Why is reversible work more than irreversible?
Since irreversible changes lead to the formation of new substances by breaking or making of new chemical bonds, therefore it requires a certain amount of energy for this change. Under normal conditions, it is not possible for substances to get that energy therefore irreversible changes are lesser than reversible.
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