Conservation Of Mass

Antoine Lavoisier

Caitlyn Kanalis and Hannah Hess

Definitions

  • Quantitative Science - relating to, measuring, or measured by the quantity of something rather than its quality.
  • Qualitative Science - the testing of a substance or mixture to determine the characteristics of its chemical constituents.
  • Phlogiston Theory - flammable materials there is a present phlogiston.
  • Phlogiston - a substance without color, odor, taste, or weight when being burned.

Antoine Lavoisier

  • Born in Paris, France 
  • (1743 - 1794)
  • Discovered the Law of Conservation of Mass

Interests/Motivations

While attending the Academy of Sciences, Lavoisier wanted want to change to change chemistry from a quantitative science to a qualitative science.

Antoine Lavoisier

Upon performing his experiments, Lavoisier proved The Law of Conservation of Mass to be true.

The Law of Conservation of Mass

  • 1785
  • Matter is neither created nor destroyed.
  • The mass of the reactants in a chemical reaction is always the same as the mass of the products in the reaction.

Diagram

  • In the video on the previous Lavoisier disproved the phlogiston theory.
  • This is a diagram of Lavoisier's dephlogisticated air experiment which disproved the theory.


Relation to the Atom

  • The Law of Conservation of Mass exemplifies how mass can be neither created nor destroyed.  
  • Atoms make up objects and their mass, therefore, atoms can not be created nor destroyed, they are in constant existence.

Relation to Chemistry

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants in the reaction.

Conclusions

  1. Antoine Lavoisier provided evidence for the Law of Conservation of Mass.
  2. Mass cannot be created nor destroyed.
  3. Atoms make up the mass of all objects.
  4. Atoms are in constant existence.


Questions?

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Public - 9/14/16, 1:27 PM