Chemical and Physical Changes

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7 Terms

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Physical Change

A change in a substance however the identity of a substance has NOT changed

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Chemical Change

Occurs when a substance has turned into something new

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Visual signs of chemical change

  • Changes in color

  • Bubbling

  • Precipitate

  • Evolution of heat or light

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Endothermic reactions

Gain heat

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Exothermic reactions

Release heat

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Law of Conservation of Mass

Mass and matter cannot be created or destroyed

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