write difference between physical and chemical change
Answers
Answer:
Physical change
Physical changes only effect physical properties. Physical changes produce no
energy Physical changes produce no new substances the atoms are arranged the same way in the products and reactants.
Physical changes are generally easy to reverse
Chemical change
Chemical changes will effect both physical and chemical properties.
Chemical changes produce energy generally in the form of heat, light, or sound.
Chemical changes produce new substances the atoms rearrange and form new compounds.
Chemical changes are not easily reversible without an additional chemical reaction.
Step-by-step explanation:
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Answer:
There are many differences between physical and chemical changes and it is important to understand them to be able to understand these concepts clearly. The comparisons and differences between physical and chemical changes are given below along with their examples. To understand physical and chemical properties and changes better, it is important to know what they are. Visit physical and chemical changes to know more about them in detail. In this article, the differences between physical changes and chemical changes are provided in a tabular format.
Differences Between Physical and Chemical Change
Physical Change Chemical Change
When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged. When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.
Physical change is a temporary change. A chemical change is a permanent change.
A Physical change affects only physical properties i.e. shape, size, etc. Chemical change both physical and chemical properties of the substance including its composition
A physical change involves very little to no absorption of energy. During a chemical reaction, absorption and evolution of energy take place.
Some examples 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.
Generally, physical changes do not involve the production of energy. Chemical changes usually involve the production of energy (which can be in the form of heat, light, sound, etc.)
In a physical change, no new substance is formed. A chemical change is always accompanied by one or more new substance(s).
Physical change is easily reversible i.e original substance can be recovered. Chemical changes are irreversible i.e. original substance cannot be recovered.
Step-by-step explanation:
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