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28 December, 11:25

Explain why changes of state are physical changes.

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  1. 28 December, 13:51
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    Physical changes are those that have a change in "characteristics" therefore state change is when the state (solid, liquid, gas) are changed.

    In your answer you can put because state change is when the substance changes to a solid, liquid, or gas.

    sorry if its confusing ... however chemical changes are when there is a rection between two interactions of substances and there is gas formed, along with heat, and is difficult to reverse.
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