Give ten difference between physical and chemical change.
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Answers
Explanation:
hiii navishtha Difference Between Physical and Chemical Change
Sl. No.
Differentiating Property
Physical Change
Chemical Change
1
Explanation
In a physical change, the molecules are rearranged while their actual composition remains same.
In a chemical change, the molecular composition of a substance completely changes and a new substance is formed.
2
Example
Some example of physical change are freezing of water, melting of wax, boiling of water, etc.
A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
3
Reversibility
Physical change is easily reversible i.e original substance can be recovered.
Chemical change is irreversible i.e. original substance cannot be recovered.
4
Formation of new substance
In physical change, no new substance is formed.
A chemical change is always accompanied by one or more new substance(s).
5
Type of Change
Physical change is a temporary change.
Chemical change is a permanent change.
6
Energy Production
In a physical change, no energy is produced.
In a chemical change, energy is produced (heat, light, sound, etc.)
7
Absorption of Energy
Physical change involves very little to no absorption of energy.
During chemical reaction, absorption and evolution of energy takes place.
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1. A change in which the atoms are reorganized, but their composition on the inside remains the same is called Physical Change. A procedure in which the substance converts into a new substance, having a dissimilar chemical composition, it is called Chemical Change.
2. Some mutual examples of physical changes are vaporization, condensation, FP/MP/BP of water. On the other hand, the illustrations of chemical change are metabolism, combustion cooking of egg, etc.
3. Physical change is short-term; they are easily reversible. As compared to this, the chemical change is long-lasting in nature, i.e. they cannot be overturned, even by reversing conditions.
4. In the physical change, only the form of the substance is altered, but no new product is produced. On the other hand, when there is a chemical reaction, a totally different product is produced, whose properties are totally different from that of the reacting substances.
5. In a physical change, the original substance can be recovered, by basic physical methods. As compared, in chemical change the original substance no longer exists, and so it cannot be recovered back.
6. In the physical change, alteration in the physical characteristics of the substance is saw, such as size, shape, texture, smell, appearance, density and so on. On the other hand, chemical change includes the alteration in chemical properties of the substance, i.e. change in its chemical nature.
7. In the physical change, not or very little volume of energy is absorbed or liberated as light or sound energy, heat. Contrasting chemical change, wherein huge energy is absorbed or liberated as heat, light or sound energy