1. Gas Particles are Far Apart:
* Unlike solids and liquids, gas particles are widely spaced. There's a lot of empty space between them.
* This large distance between particles means they experience very weak attractive forces between each other.
2. Gas Particles Move Randomly:
* Gas particles are constantly in rapid, random motion. They collide with each other and the walls of their container.
* This constant, high-speed movement means the particles don't stay in fixed positions.
3. Lack of Definite Shape:
* Because gas particles move freely and are not held in a fixed position, they can spread out to fill any container they occupy.
* They take on the shape of their container because they are not held together by strong intermolecular forces.
4. Lack of Definite Volume:
* The weak forces between gas particles mean they can be compressed easily.
* If you apply pressure, the particles are forced closer together, reducing the volume the gas occupies.
* If you decrease the pressure, the gas expands to fill the available space.
In Summary:
The combination of these characteristics – widely spaced particles, random motion, and weak intermolecular forces – means gas particles have complete freedom of movement. This freedom allows gases to expand to fill any container and readily change their volume in response to pressure changes.
