jose eduardo lopez vera
⟶ Updated 5 months ago ⟶
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Johann Joachim Becher - his theories about combustion influenced Stahls Theory of Phlogiston, Johann Theorised that matter is made up of three earths, the vitrifiable, the mercurial and the combustible. He thought that when a material combusted it was the combustible earth that was being liberated.
Georg worked with Johann and they both used a similar theory when it came to combustion, Georg expanded the idea of Johann when it came to combustible materials when he renamed the terra pinguis or flammable earth to phlogiston, which in greek means flammable.
Boyle warned the other members of the scientific community that there was a possibility that they were making wrong deductions from the calcination of metals, due to overlooked variables such as air. He urged them to take in consideration other aspects that may be overlooked.
Mikhail disproved the Phlogiston theory by replicating Boyle’s experiment from 1673. Quoting Lomonosov "Today I made an experiment in hermetic glass vessels in order to determine whether the mass of metals increases from the action of pure heat. The experiments– of which I append the record in 13 pages– demonstrated that the famous Robert Boyle was deluded, for without access of air from outside the mass of the burnt metal remains the same".
Joseph Black - British chemist Known for the rediscovery of fixed air or carbon Dioxide and the concept of latent heat.
Cavendish’s experiments with dephlogisticated drove him to the conclusion that hydrogen could be what Georg Ernst Stahl called Phlogiston. He then proceeded to report this findings to Priestly.
Joseph Priestley is Highly regarded for his discovery of oxygen and an explanation as to why materials burn, he worked in conjunction with Henry Cavendish. Published in 1775
Daniel Rutherford was a student under Joseph Black and Black passed his experiments to Daniel. He decided to test on phlogisticated air, he placed a mouse, a candle and a Burning piece of phosphorus inside a chamber containing phlogisticated air, the mouse died and the fires burnt out without consuming all the material, He repeated the test without changing the chamber and discovered that the mouse wouldn't survive and no combustion would occur to the Phosphorus or candle. His conclusion was that
Antoine Lavoisier - Stated that gases with weight (Oxygen) are needed for materials to burn, further disproving the Phlogiston Theory.
Through experimentation he came to the conclusion that prussic acid and Hydrogen Sulfate acid did not contain oxygen and this disproved the theory proposed by Antoine Lavoisier about acidity being caused by oxygen but Claude was a supporter of the oxygen theory of combustion rather than the phlogiston theory.
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