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820. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. Interpret the results of an investigation to determine whether a physical or chemical change has occurred. Key concepts/skills: Level 1: Define key vocabulary.

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820

Interpret the results of an investigation to determine whether a physical or chemical change has occurred.

slide2
Interpret the results of an investigation to determine whether a physical or chemical change has occurred.

Key concepts/skills:

Level 1: Define key vocabulary.

Level 2: Identify the chemical and physical

properties of matter.

Level 3: Distinguish between physical and

chemical changes given investigations

or situations.

slide3
Interpret the results of an investigation to determine whether a physical or chemical change has occurred.

Key vocabulary

Physical properties flammability

Physical change reactivity

Chemical properties

Chemical change

slide4
Interpret the results of an investigation to determine whether a physical or chemical change has occurred.
  • Physical Properties
    • Size, Shape, Color, Odor, Texture, things that can be observed with senses
    • Change of state, malleability, ductility, conductivity
    • All Physical properties change during a chemical reaction
    • Physical Properties> New Physical Properties
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Interpret the results of an investigation to determine whether a physical or chemical change has occurred.

II. Chemical Properties

  • Flammability – how easily a substance burns
  • Reactivity – how easily a substance reacts with others
  • A substances chem. props. Going into a reaction change completely and the substance coming out of the reaction has new chemical properties

D. Chem Props. > New chem. Props

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Interpret the results of an investigation to determine whether a physical or chemical change has occurred.

III. Physical changes

  • A change in physical properties without changing the identity of the substance (paper is still paper)
  • Note phys props. change but not chem. props.
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Interpret the results of an investigation to determine whether a physical or chemical change has occurred.
  • Chemical Changes
    • When one or more substance changes into new substances with new chem. and phys. props.
    • Note Chem. and Phys. props change with a chem. Change
    • Chem. Changes are not reversible by any physical means
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Interpret the results of an investigation to determine whether a physical or chemical change has occurred.

1. Is gas, heat, or light given off?

If Yes Chemical

2. Does the substance maintain its identity?

If yes physical

3. Are more than 2 physical properties changed?

If yes chemical

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Interpret the results of an investigation to determine whether a physical or chemical change has occurred.

Chemical or physical change?