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.
Condensation: the vapour state compound converted into liquid. Here required energy to be removed.
Freezing: liquid state compounds are converted into solid state. Here required energy to be removed.
Vaporisation: liquid state compounds are converted into vapour state. Here required energy to be added.
Deposition: gaseous state directly converted into solid. Here required energy to be removed.
Melting: solid state is converted into liquid state. Here required energy to be added.
Sublimation: solid state directly converted into gaseous state without existing of liquid state. Here required energy to be added.
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