Sunday, 18 November 2012

Mass Conservation Law (Lavoisier's Law)

The Topic about Mass Conservation Law (Lavoisier's Law)

Antoine Laurent Lavoisier is a French Chemist who was a pioner of modern chemistry. Through some experiment. Lavoisier succeeded in studying the chemical reactions quantitatively. through some experiment, Lavoisier examined the nature of combustion. Based on the result of these experiments, he demostrated that combusion is a process that involves the combination of a substace with oxygen. He also demonstrated the role of oxygen in animal and plant respiration. Lavoisier's explanation of combusion replaces the phlogiston theory, which postulates that materials release a substance called phlogiston when thay are burning.

   One of Lavoisier's most important experiments is about the mass of substances in a chemical reaction. Through an experiment, Lavoisier showed that although a substance changes its state in a chemical reaction, the quantity (mass) of substance remains constant after and before every chemical reaction Mass Conservation Law (Lavoisier's Law). These experimants provided evidence for the matter conservation law, that in turn brought about the mass conversation law. 

The Lavoisier's conclusion above is obtained based on the result of tin combustion experiment with two different treatments.At first treatment, tin is burned at an opened place, while at second treatment, tin is burned at a closed place. The result of the experiment shows that tin burned in the opened place undergoes the change of mass before and after burning, while tin burned in the opened place undergoes the chacnge of mass before and after burning, while tin burned in the closed place does not undergoes the change of mass before and after burning. According to Lavoisier, combustion of substance at an opened place cause the substance to absorb or release other substance from and into the air, so that it causes the change of the substance mass, while at the closed place there are no other substances absorbed or released during the reaction, so that mass of the object is relatives constant.

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Mass Conservation Law (Lavoisier's Law)
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