Respuesta :
This is because the inter-molecular force of attraction between the molecules in a liquid is less when compared to solids and the liquid molecules are loosely packed. In a liquid, the particles are in close contact and so they have a definite volume.
A material is considered to exist in a solid state if it has a defined form and volume. A material is considered to exist in a liquid state if it has a known volume but no known form. A material is considered to exist in a gaseous state if it neither has a fixed form nor a fixed volume.
Strong intermolecular forces of attraction between the molecules present inside solid substances allow extremely tiny intermolecular gaps to remain between the molecules, giving the solids a distinct structure and volume.
Due to the weak intermolecular force of attraction present and the fact that there are more intermolecular gaps in liquids than in solids, liquids have a defined volume but no defined form.
Because the smallest intermolecular forces of attraction exist, gases lack both a defined shape and volume. As a result, the intermolecular space between molecules is quite vast, allowing gases to diffuse more readily.
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