The water being boiled is pure water. When the water is heated the kinetic energy of the water molecules increases, meaning that the molecules begin to move faster. As the their speed increases they begin to overcome their attractions to the other molecules. This eventually allows the water to change from a liquid to a gas as molecules escape out of the liquid and into the air.
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
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