# Why is mass conserved the same in chemical reactions?

## Why is mass conserved the same in chemical reactions?

No atoms are created or destroyed in a chemical reaction. Instead, they just join together in a different way than they were before the reaction, and form products . This means that the total mass of the products in a chemical reaction will be the same as the total mass of the reactants .

## What is the relevance of energy mass equivalence relation in chemical reactions?

Massless particles such as photons have zero invariant mass, but massless free particles have both momentum and energy. The equivalence principle implies that when energy is lost in chemical reactions, nuclear reactions, and other energy transformations, the system will also lose a corresponding amount of mass.

What do you mean by mass-energy equivalent?

Mass-energy equivalence is the famous concept in physics represented mathematically by , which states that mass and energy are one and the same. This equation is only representative of an object at rest, so this energy is called the “rest energy” of an object.

How does mass get converted to energy?

We can transform mass into pure energy, such as through nuclear fission, nuclear fusion, or matter-antimatter annihilation. We can create particles (and antiparticles) out of nothing more than pure energy.

### How does mass change in a chemical reaction?

The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. The carbon atom changes from a solid structure to a gas but its mass does not change. Similarly, the law of conservation of energy states that the amount of energy is neither created nor destroyed.

### Do chemical reactions convert mass to energy?

Every chemical reaction involves conversion between energy and mass. In contrast, chemical reactions (changes to only the electrons in atoms) release or absorb very little energy compared to nuclear reactions, so the change in mass of the system is often so small that it can be ignored.

Is mass potential energy?

The gravitational potential energy of an object is the ‘stored energy’ that the object has by being at that height. This is equivalent to its mass times the force of gravity, g (a defined constant of 9.8 m/s2) times the height of the object. Potential energy = mass x gravity x height.

Which is a consequence of the mass-energy equivalence?

A consequence of the mass–energy equivalence is that if a body is stationary, it still has some internal or intrinsic energy, called its rest energy, corresponding to its rest mass.

## How is mass conserved in a chemical reaction?

Therefore in a chemical reaction, though the number of atoms (or electrons, protons, neutrons) are conserved, the rest mass is not, since the bond energy is changed. And this can be called mass being converted into energy. Motional mass, however, is just another name for energy, and therefore always conserved.

## What does it mean when mass and energy are the same?

Mass-energy equivalence means mass and energy are the same and can be converted into each other. Einstein put this idea forth but he was not the first to bring this into the light.

How is mass energy related to binding energy?

By measuring the masses of various nuclei and subtracting it from the sum of masses of protons and neutrons, Binding energy is calculated. Measurement of binding energy is used to calculate the energy released during nuclear reactions. Einstein’s equation is used to find out the change in mass during the chemical reactions.