The Law of Conservation of Mass

In the conservation law of mass, the quality of an isolated system is not generated or destroyed by chemical reactions or physical transformations.

According to conservation law of mass, the mass of the product in the chemical reaction must be equal to the mass of the reactant.

Mass conservation law can be used in various calculations to solve unknown mass, such as the amount of gas consumed or produced during reaction.

Reactants are participants that appear at the beginning of a chemical reaction. In addition, the previous molecule undergoes chemical changes

Under the law of mass storage, it is stipulated that quality can not be created or destroyed but only reorganized.

The ancient Greeks first proposed the idea that the total amount of matter in the universe is constant. However, in 1789 Antoine Lavoisier described the law of conservation of mass (or mass / substance conservation law) as the basic principle of physics.

In the law, despite chemical reactions and physical changes, the quality is stored in an isolated system, that is, it can not be created or destroyed. In other words, in a chemical reaction, the mass of the product is always equal to the mass of the reactant.

This law was later modified by Einstein in the law of conservation of mass. It explains the fact that the total mass and energy in the system remain the same. This revision includes the fact that quality and energy can be converted to each other. However, since the energy produced or consumed in a typical chemical reaction occupies a small amount of mass, the conservation of mass conservation is still a useful concept in chemistry.

Therefore, a chemical reaction can be regarded as rearrangement of atoms and bonds, and the number of atoms participating in the reaction does not change. By this assumption, the chemical reaction can be expressed as an equilibrium equation. In this equation, the number of moles of any element involved is the same on both sides of the equation. Another useful application of this method is to determine the quality of gaseous reactants and products. If you know the total solid or liquid reactant and product, you can assign the remaining mass to the gas.

The law of conservation of mass indicates that the total mass present before the chemical reaction is the same as the total mass existing after the chemical reaction, that is, the mass is preserved. For his combustion experiments, Lavoisier developed a conservation law that he observed the quality of his original material - glass container, tin and air - mass of material produced - glass container, glass tin, Remaining air. Historically, this is a concept that scientists can not understand. If this law is right, will we be able to reduce big wood pieces to small ash piles? Trees are considerably heavier than ashes. From this observation, the scientists believe that the quality has disappeared, but the graph \ (\ PageIndex {1} \) indicates that word burning follows the law of mass protection. Scientists were not thinking about gases that play an important role in this reaction.

Let's talk about mass preservation law, mass conservation law only shows what it is like. Even if we change substances, we will not permit the creation of substances from the beginning or the destruction of substances to be eliminated. So, how does chemical reaction handling chemical reactions help? This is the scenario we are accustomed to using the conservation law of mass.