A Vogadro :: essays research papers fc

A vogadro was born on June 9, 1776 in Turin, Italy. He began his life story in 1796 by obtaining a doctorate in law and practicing as a lawyer for three years after. In 1800, he began to scoop out private lessons in mathematics and physics and decided to make the indispensable sciences his profession. He was appointed as a demonstrator at the honorary society of Turin in1806 and the Professor of Natural Philosophy at the College of Vercelli in 1809, and in 1820, he was appointed the prof of mathematical physics. He was a physics professor but he also experimented in chemistry using mathematics to base closely of his findings. Avogadro is well known for his hypothesis known as Avogadros Law. His law states that at a given temperature, equal volumes of gas determine the same issue of molecules equal to about 6.0221367 x 10 to the twenty- third base power.A Mole of a substance is the quantity of the substance that weights the same as its molecular mass. One mole of any substance is Equal to Avogadros number. consequently Avogadros law can be stated in terms of moles, viz. that equal volumes of gases at the same temperature and pressure contain the same number of moles. Thanks to Avogadro and his number, scientists can measure out equal number of molecules by weighing out an equal number of moles. For gases this can be do by using 22.4 liters at STP(1 atmosphere and 223 Kelvin, 0 deg. Celsius). Avogadros number is most reliably determined by X-ray diffraction of crystals. For many years people apprehension the number was equal to about 6.022045 x 10 to the 23rd power, However, in 1986 the number was redefined as about 6.0221367 x 10 to the 23rd power.Albert Einsteins third research paper was concerned with the nature of molecules. We all know that if we contrive a lump of clams into water it diffuses through the water, making it some more sticky. Thinking of water as a structureless fluid and the sugar molecules as small hard spheres, Einstein was able to find not only the size of the sugar molecules but also a comfort for Avogadros number. Avogadro proposed his hypothesis in 1811. At that time there was no data at all on the number of particles in a mole. Measurements were make by Robert Brown in 1827 that gave an approximate value for Avogadros number by observations of brownian motion.