Explain the physical and Chemical changes with two Examples
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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. ... In a physical change, no new substance is formed. A chemical change is always accompanied by one or more new substance(s).
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Physical changes: are changes affecting the form of a chemical substance, but not it's chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.
Some examples of physical change are freezing of water, melting of wax, boiling of water, etc.
Chemical changes: occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
Some examples of chemical change are digestion of food, burning of coal, rusting, etc.
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