Physical and Chemical Change.

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Created by
Mimi

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Cards (42)

  • Physical change
    The chemical identity remains the same, you still have the same substance
  • Chemical change
    The chemical identity of the substance actually changes, you have a new chemical formula
  • Physical change
    • Crumpling paper
  • Crumpling paper is a physical change, the substance is still the same
  • Chemical change
    • Burning paper
  • Burning paper is a chemical change, the chemical identity of the paper changes into carbon dioxide and water vapor
  • Physical change
    • Freezing water
  • Freezing water is a physical change, the chemical identity (H2O) remains the same
  • Chemical change
    • Electrolysis of water
  • Electrolysis of water is a chemical change, it breaks down into hydrogen gas and oxygen gas, new chemical substances
  • Chemical change
    • Burning gasoline
  • Burning gasoline is a chemical change, it reacts with oxygen to form carbon dioxide and water, new chemical substances
  • Chemical change
    • Rusting of iron
  • Rusting of iron is a chemical change, iron reacts with oxygen to form iron oxide, a new substance
  • Physical change
    • Boiling water
  • Boiling water is a physical change, it converts liquid water to steam, but the chemical identity (H2O) remains the same
  • Physical change
    • Melting ice
  • Melting ice is a physical change, it converts solid ice to liquid water, but the chemical identity (H2O) remains the same
  • A color change in a solution usually indicates a chemical change, as the chemical identity has changed
  • Physical change
    • Vaporization, condensation, sublimation, deposition
  • Changes in state of matter (solid, liquid, gas) are physical changes
  • Chemical change

    • Zinc metal reacting with acid
  • Corrosion, where a metal reacts with something, is a chemical change
  • Physical change
    • Pulling copper into a wire
  • Ductility and malleability of metals, like pulling into wires or hammering into sheets, are physical changes
  • Chemical change
    • Silver tarnishing
  • Silver tarnishing, where it reacts with sulfur to form silver sulfide, is a chemical change
  • Chemical changes can be identified by observing color changes or gas production.
  • A chemical change is when the properties of a substance are changed, resulting in new substances.