1. Random Motion:
* Free to move: Unlike solids where particles are fixed in a lattice, liquid particles have more freedom to move around.
* Constant motion: They constantly jiggle and vibrate, but their movement is not as free as in a gas.
* Collisions: They collide with each other and with the walls of their container.
2. Diffusion:
* Spreading out: Liquid particles will slowly spread out to fill their container. This is due to their random motion and collisions.
* Concentration gradient: Diffusion happens faster when there's a larger difference in concentration of particles in different areas of the liquid.
3. Flow:
* Liquids can flow: Unlike solids, liquids can flow and take the shape of their container. This is because their particles can move past each other relatively easily.
* Viscosity: The resistance to flow is called viscosity. Thick liquids like honey have high viscosity, while thin liquids like water have low viscosity.
4. Surface Tension:
* Cohesive forces: Liquid particles are attracted to each other. This attraction, called cohesion, is especially strong at the surface of the liquid.
* Surface tension: The cohesive forces at the surface create a "skin" or surface tension that makes the liquid resist being broken or stretched. This is why some insects can walk on water.
5. Vapor Pressure:
* Evaporation: Some liquid particles at the surface have enough energy to escape into the air as a gas (this is called evaporation).
* Vapor pressure: The pressure exerted by the vapor above the liquid is called vapor pressure. This pressure increases as the temperature of the liquid increases.
In summary:
Liquid particles have more freedom of movement than solids, but less than gases. Their motion is random, leading to diffusion and flow. They also exhibit surface tension and vapor pressure due to the forces of attraction between them.
