discovery of molecules and atoms was the most important event in the development of the atomic-molecular theory.More in 1748, the great Russian scientist Mikhail Lomonosov formulated the law of conservation of mass as a philosophical concept.He subsequently himself summed up by its powerful proof of the practical-theoretical basis, and it happened in 1756.In parallel with the Russian scientists working on this problem A.L.Lavuaze French chemist.His version of the evidence he offered in 1789.
law of conservation of mass states that the sum of the masses of all substances that react chemically, is numerically equal to the mass of substances which are the reaction products.Initial practical ways to prove the then assumption of conservation of mass were unsuccessful.The fact that the experiments that were conducted before the University, based on the burning substances.The weighing before and after the reaction will not be consistent with the obvious, but not proven for the theory.Heating in air afforded by mercury red scale, and its weight was greater than the mass of the reacted metal.With ash emerging from the combustion of wood, the result was the opposite, the mass of the product always is less than the mass of the substance to carry out the reaction.
University merit lies in the fact that he was to prove the law of conservation of mass, the first experiments were conducted with closed systems.Easy to experience once again proved the genius Russian scientist.Calcined metals Lomonosov put in a sealed glass jar.After a successful weight of the reaction vessel remained unchanged.And only when the vessel broke up and rushed inside the air, there was an increase in the mass of the vessel.
theoretical explanation was given of the experiment conducted by lashing the nature of the combustion reaction of the metal.The weight gain is due to attachment of oxygen atoms in the oxidation product.Proving the law of conservation of mass, Lomonosov realized significant contribution to the development of the atomic-molecular theory.In practice, it proved once again that the atoms chemically indivisible.Design molecules during the reactions change, they are exchanged between atoms, but their total volume (atoms) in a closed system remains unchanged.Accordingly, the total mass of the material is constant.
law of conservation of mass became the first contribution in the knowledge of a more global nature laws.Further research in this area revealed that the closed system is not only the preservation of the masses.The energy of an isolated system is also constant.Any process that takes place in an isolated system does not produce or destroy any mass or energy.And the identification of patterns later became known: the law of conservation of mass and energy.Proceedings of the University were only the greatest proof of the special case of the law of nature.
But the knowledge of the world around us does not end there.Proceedings Einstein advanced the science even further, in his theory, he not only proved the relationship of energy and mass, but also made a bold assumption about the possibility of converting them.That now seems clear an ordinary student, formed in the course of practical experience and theoretical studies over the past three centuries.Scientists in various fields of natural science are trying to restore a powerful platform for evidence of patterns and understanding the concepts of "energy" and "mass".
Not only physics and chemistry, but also many other sciences are actively using the relationship and the principle of conservation of mass and energy.Biology, geography, astronomy are used law of conservation of mass and energy.Even under the influence of the philosophy of the law formed the modern idea of the human being.
