Question

5 difference between permanent change and temporary change

Answer 1

Answer:

Temporary in nature.

--Does not affect the internal structure of a substance, only the molecules are rearranged.

--No new substance is formed.

--Most of the physical changes are reversible. We can obtain the substance back even after the change.

Permanent in nature.

--Since the original composition of the substance changes, one or more new substances are formed.

--Forms of energy, such as heat, light or electricity, may be emitted or absorbed.

--A chemical change is generally irreversible. At least, it cannot be reversed by simple physical means.

Explanation:

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Answer 2

Answer:

Permanent changes are the one which cannot be reversed again if the form is once changes.

• Burnt woods which cannot be converted to wood again

• Burnt coal burnt will give out ashes

• Burnt bread can never be undone

• Breaking of glass

• Rusting of iron

Changes which from which no substance is form is called Temporary change.

Here are the few top examples of such changes;

• Cutting a log of wood.
• Pieces of paper.
• Melting of Ice.
• Boiling of Water.
• Mixing salt in Water.

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