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Ch 3. Sec 2 Chemical properties and changes

Ch 3. Sec 2 Chemical properties and changes. by : Barr & Batten. Chemical properties. Ability to change into a new substance. Examples of chemical properties. Flammability Incombustibility Reacts with oxygen Changes when heated Changes with electrical current Changes with Light

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Ch 3. Sec 2 Chemical properties and changes

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  1. Ch 3. Sec 2 Chemical properties and changes by: Barr & Batten

  2. Chemical properties • Ability to change into a new substance

  3. Examples of chemical properties • Flammability • Incombustibility • Reacts with oxygen • Changes when heated • Changes with electrical current • Changes with Light • Changes with water • Can burn • Doesn’t burn • Bananas turn brown • Copper turns green • Limestone becomes lime & CO2 • Water molecules can be split • Vitamins disintegrate • Alka-Seltzer

  4. Chemical Change • Change in identity, new substance formed • Demo

  5. How do you know a Chemical change has occurred? • Production of bubbles • Production of light • Production of smoke • Production of sound • Production of heat • A color change • Is the change reversible????

  6. What kind of change is it? • http://www.youtube.com/watch?v=5yjEDihEuZI

  7. Law of Conservation of Mass • Mass can not be created or destroyed

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