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Section 3.2

Section 3.2. Changes in Matter. Objectives. Define physical change and list several common physical changes Define chemical change and list several common chemical changes Apply the law of conservation of mass to chemical reactions. Physical Changes.

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Section 3.2

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  1. Section 3.2 Changes in Matter

  2. Objectives • Define physical change and list several common physical changes • Define chemical change and list several common chemical changes • Apply the law of conservation of mass to chemical reactions

  3. Physical Changes • Alter a substance without changing its composition • Cutting paper • Crumbling foil • Changes in the state of matter

  4. Condensation

  5. Chemical Changes • Process in which 1or more substances change into new substances • chemical reaction • Ex: • Rusting • Burning

  6. Chemical Change

  7. Five Indicators of Chemical Reactions

  8. 1. Odor Change

  9. 2. Color Change

  10. 3. Formation of a Solid/Liquid Precipitate

  11. 4. Gas Formed

  12. 5. Energy Released/Absorbed

  13. Conservation of Mass • Mass in neither created nor destroyed during a chemical reaction • Mass is always conserved • This is a law!!!

  14. Mass of Reactants = Mass of Products

  15. Homework • Physical and Chemical Changes Worksheet

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