Matter around us 1 big Flashcards
Explain why solids have fixed shape but liquids and gases do not have fixed shape.
Solids have fixed shapes due to the strong intermolecular forces of attraction between them.- The liquids and gases have molecules with the less intermolecular force of attraction- so they take the flow and shape of the container.
Why is water liquid at room temperature?
At room temperature, the particles of water have some intermolecular force of attraction- and the room temperature cannot provide sufficient heat for these molecules- to overcome their force of attraction and therefore remain in the liquid phase.
How is the high compressibility property of gas useful to us?
(1) LPG (liquefied petroleum gas) is a fuel that is made up of petroleum gas. On compressing this petroleum gas it forms a liquid.
(2) Oxygen cylinders in the hospitals have compressed gas filled in them.
(3) CNG (compressed natural gas) is a natural gas which is compressed and used as fuel in vehicles and at home.
