Why do solid liquids and gases differ in their physical states
Answers
1.Solid
Solids have a set shape and volume. In a solid, the particles are more closely arranged. The particles have less net movement. Solids are rigid, meaning that the particles are “locked” into place. Solids are not easily compressible, given that they have a set volume. Solids do not flow easily, because the particles are rigidly connected and do not move past one another.
2.Liquid
Liquids have a set volume, but they can change shape depending on what container they are in. The particles in a liquid move more freely within the set volume. Liquids do not form structures like solids, because of the intermolecular movement. Liquids are also not easily compressible, because of the set volume. Liquids flow easily because the particles are able to move past each other easily.
3.Gas
Gases can change shape and volume. Gas particles will spread out as far as they need to in order to fill the container. They will take the shape and volume of whatever container they're in. They are easy to compress because there is a lot of space between the particles. It also flows easily because of the amount of space between particles.
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Explanation:
Change in physical state of solid, liquid and gases occurs due to difference in intermolecular forces of attraction between each of them.
In solids, molecules are held together by strong intermolecular forces of attraction. As a result, molecules are closer to each and thus, solids have fixed shaped.
In liquids, molecules have less intermolecular forces of attraction as compared to solids. As a result, molecules are able to move from their initial place. Thus, liquids are able to flow and they can take the shape of any container in which they are placed.
In gases, molecules are held by weak Vander waal forces. As a result, their molecules move far apart from each other and they are able to diffuse readily into the surroundings.