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Chemistry before and after the scientific revolution
Essay about modern history of chemistry
Chemistry before and after the scientific revolution
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Robert Wilhelm Eberhard Bunsen was born on March 31, 1811 in Göttingen University. He was a German chemist, and from his invention of the Bunsen burner, which Peter Desega had aided him with, he became famous around the world. Robert had earned his highest degree award in his father’s University in Germany. Robert was said to be the most influential chemistry teacher of his time, and had even taught Dmitri Mendeleev who was the creator of “The Periodic Table of Elements.” Furthermore, Robert and Gustav Kirchhoff were the first two people to use spectroscopy in a chemical analysis, which had led to the discovery of the two elements known as Cesium, and Rubidium. Robert had also written many letters and books, which are now held in the RSC archive, and had worked until his retirement at the University of Heidelberg. Bunsen had a friend named Sir Henry Roscoe who had also stated that Bunsen was a great man. However, he had never married, which is what allowed Robert to be more devoted to his work and research. Even though Robert was a popular man to many, he had unfortunately died in 1899. Robert had lost his vision in his right eye when an organic compound had exploded during his research on Organic Chemistry.
Richard August Carl Emil Erlenmeyer was born in the year of 1825, in Taunusstien, Hesse. He had studied physics and other subjects before studying chemistry. Erlenmeyer had once been enthusiastic about pharmacy, but had lost his excitement for it, which led him back to the University of Gießen to study chemistry. For his PhD, Emil made a thesis that had grabbed the interest of Robert Bunsen. At the University of Heidelberg, he had introduced the formula of naphthalene and the Erlenmeyer rule of keto-enol tautomerism. In 18...
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...sen burner, the oxygen gives more energy to the electrons in the flame, causing the flame to heat up more and more. Therefore, the chemical reaction of methane gas reacting with oxygen to produce carbon dioxide and water vapor is given off by the Bunsen burner. We can now understand that the yellow flame contains heat as a cause of the oxygen that was a part of the reaction, but to make the flame hotter, the percentage of oxygen being fed to the Bunsen burner must increase.
The twisting of the Bunsen burner barrel makes it work better because it allows oxygen to be added, which then allows the flame to become hotter, permitting you to heat substances at a faster rate, so that you can be more productive. This is because, when you add oxygen, the oxygen gives off energy to the electrons that make it move more rapidly, causing the flame to turn from yellow to blue.
This chemistry book report is focus on a book called “Napoleon's buttons: How 17 molecules changed history” by Penny Le Couteur and Jay Burreson. The publisher of this book is Tarcher Putnam, the book was published in Canada on 2003 with 17 chapters (hey the number match the title of the book!) and a total of 378 pages. The genre of this book is nonfiction. “Napoleon's Buttons” contain a fascinating story of seventeen groups of molecules that have greatly changed the course of history and continuing affect the world we live in today. It also reveal the astonishing chemical connection among some unrelated events, for example: Chemistry caused New Amsterdamers to be renamed New Yorkers and one little accident of detonating cotton apron in a minor housekeeping mishap lead to the development of modern explosives and the founding of the movie industry.
For the first phenomena, he noted how all combustions involved the formation of fire or light. With that in mind, Lavoisier also observed that this combustion occurs only through dephlogisticated air / pure air. Other airs (e.g. carbon dioxide) act as a fire extinguisher similar to that of water. Another combustion phenomenon he outlined was how the weight of the burnt material directly relates to the amount of air used in the reaction. Moreover, he also described how certain substances turn into acids after it has been burn...
middle of paper ... ... The Web. 22 Feb. 2014. http://www.chemheritage.org/discover/online-resources/chemistry-in-history>.
John Dalton, born 6th September 1766, is known for developing the theory of the elements and compounds atomic mass and weights and his research in colour blindness.
OH 27000 J/g. Hexane C H 35000 J/g. Variables:.. The variables used in this experiment are: Volume of water, mass of fuel, temperature of water, height of tube. height of flame, type of fuel, time it takes, width of flame, colour. of flame, material of container, size and surface area, purity of.
Strontium was discovered by Adair Crawford, an Irish chemist, in 1790 while studying the mineral witherite (BaCO3). When he mixed witherite with hydrochloric acid (HCl), he did not get the results he expected. He assumed that his sample of witherite was contaminated with an unknown mineral, a mineral he named strontianite (SrCO3). Strontium was first isolated by Sir Humphry Davy, an English chemist, in 1808 through the electrolysis of a mixture of strontium chloride (SrCl2) and mercuric oxide (HgO). Strontium reacts vigorously with water and quickly tarnishes in air, so it must be stored out of contact with air and water. Due to its extreme reactivity to air, this element always naturally occurs combined with other elements and compounds. Strontium is very
In commercial processing, the burning takes place in large concrete or steel silos with very little oxygen, and stops before it all turns to ash. It is said that the “procedure leaves black lumps and powder which is about 25% of the original weight. When ignited, the carbon in charcoal merges with oxygen and forms carbon dioxide, carbon monoxide, water, other gases, and significant quantities of energy.” It packs more potential energy per ounce than raw wood. Stated by Goldwyn that the char combust steadily, hot and it produces less smoke and lesser unhazardous
Bunsen burner flames depend on airflow in the throat holes (on the burner side, not the needle valve for gas flow): 1. air hole closed (safety flame used for lighting or default), 2. air hole slightly open, 3. air hole half open, 4. air hol
Uranium, a radioactive element, was first mined in the western United States in 1871 by Dr. Richard Pierce, who shipped 200 pounds of pitchblende to London from the Central City Mining District. This element is sorta boring but I found something interesting, they used it to make an an atomic bomb in the Cold War. In 1898 Pierre and Marie Curie and G. Bemont isolated the "miracle element" radium from pitchblende. That same year, uranium, vanadium and radium were found to exist in carnotite, a mineral containing colorful red and yellow ores that had been used as body paint by early Navajo and Ute Indians on the Colorado Plateau. The discovery triggered a small prospecting boom in southeastern Utah, and radium mines in Grand and San Juan counties became a major source of ore for the Curies. It was not the Curies but a British team working in Canada which was the first to understand that the presence of polonium and radium in pitchblende was not due to simple geological and mineral reasons, but that these elements were directly linked to uranium by a process of natural radioactive transmutation. The theory of radioactive transformation of elements was brilliantly enlarge in1901 by the New Zealand physicist Ernest Rutherford and the English chemist Frederick Soddy at McGill University in Montreal. At dusk on the evening of November 8, 1895, Wilhelm Rontgen, professor of physics at the University of Wurzburg in Germany, noticed a cathode tube that a sheet of paper come distance away. He put his hand between the tube and the paper, he saw the image of the bones in his hand on the paper.
He was thought to die because of the burns on his skin he got from the radioactivity (Henri Becquerel
What this means for the reaction is that there isn’t as much bonds being produced which will ultimately affect the amount of energy released in the form of heat, thus decreasing the overall heat of combustion whilst also effecting the reliability of the calculations.
The history of chemistry has a span of time reaching from ancient history to the
Benz, Francis E.. Pasteur Knight of the Laboratory. New York, New York: Dodd, Mead and Company, 1938. 73-141.
).on the other hand albert einstain admitted ‘“My new discovery is the result of musical perception”” (Suzuki, 1969,p._90). The swidish chemistis was attached to chemstri after his painting classes when he came acrros a color theory made by physicist Ogden Rood and chemist Wilhelm Ostwald . after he took chestriy and physics he proved it nd won a nobel