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Understanding Physical vs. Chemical Properties in Matter

Learn the distinction between physical characteristics like color and density and chemical properties such as flammability and reactivity, essential in identifying substances and understanding their behavior.

jolene-joseph
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Understanding Physical vs. Chemical Properties in Matter

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  1. Chapter 1 Notes Section 2+3

  2. Physical Properties (characteristics) can be observed or measured without changing the object

  3. Examples: • 1. Color • 2. Odor • Thermal conductivity– ability • to transfer heat

  4. 4. Solubility ability to dissolve 5.Malleability – ability to be pounded into thin sheets 6. Ductility– ability to be pulled into thin wires

  5. Density mass per unit volume • Density is the same for the same substance • Density of one substance is usually different than the density of other substances

  6. Formula to calculate density: D = M Density = Mass (g) V Volume (mL) The density of pure water is 1 g/mL

  7. A substance with a density greater than water sinks in water A substance with a density less than water floats in water

  8. Chemical Properties are based on the ability of a substance to change into another substance with new and different properties

  9. Examples: Flammability – ability to burn Nonflammable – will not burn

  10. Reactivity with oxygen Reactivity with water Reactivity with acid

  11. Physical changes affect only the appearance of a substance

  12. Examples Melting Dissolving Sanding Cutting

  13. Bending Mixing

  14. Chemical change is a process where a substance changes into another substance

  15. Examples Color change Fizzing Sound or Light

  16. Odor Temperature

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