Avogadro's Law

By: Samantha Williams

Amedeo Avogadro was an Italian scientist. Because of his contributions to the theory of molarity and molecular weight, Avogador's number and Avogadro's law were named in honor of him. While staying in Vercelli, he wrote the hypothesis of Avogardo's law, which is equal volumes of gases, at the temperature and pressure, contain the same number of molecules. He developed his hypthesis after Gay-Lussac published his gas law. Gay-Lussac's law states that when two volumes of gases react with one another to create a thrid gas, the ratio between the volume of the reactants and the volume of the product is always made of whole numbers (which means there is nothing left over). Avogadro's realized that in order for this to be true, equal volumes of any two gases at the same temperature and pressure must hold an equal number of particles, which is Avogadro's law.