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a change from one state (solid or liquid or gas) to another without a change in chemical composition

a change from one state (solid or liquid or gas) to another without a change in chemical composition

a change from one state (solid or liquid or gas) to another without a change in chemical composition

a change from one state (solid or liquid or gas) to another without a change in chemical composition

a change from one state (solid or liquid or gas) to another without a change in chemical composition