Sometimes these changes are spontaneous while sometimes these changes are introduced. Physical changes are the changes only in the physical properties of a substance is often reversible. Chemical changes bring about a change in the chemical composition of a substance and in most cases are irreversible.
Sometimes these changes are spontaneous while sometimes these changes are introduced. Physical changes are the changes only in the physical properties of a substance is often reversible. Chemical changes bring about a change in the chemical composition of a substance and in most cases are irreversible.
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Sometimes these changes are spontaneous while sometimes these changes are introduced. Physical changes are the changes only in the physical properties of a substance is often reversible. Chemical changes bring about a change in the chemical composition of a substance and in most cases are irreversible.
Sometimes these changes are spontaneous while sometimes these changes are introduced. Physical changes are the changes only in the physical properties of a substance is often reversible. Chemical changes bring about a change in the chemical composition of a substance and in most cases are irreversible.
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