C1.1a-c Particles and Changes
- Created by: reneesimba
- Created on: 31-03-18 04:51
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- C1.1ADescribe the main features of the particle model in terms of state of matter and change of state
- solids
- have a regular arrangement, are tightly packed and vibrate in their fixed positions
- liquids
- have a random arrangement, quite close together and slide past together.
- Solids and liquids cannot be compressed as there is not enough space for them to move into
- have a random arrangement, quite close together and slide past together.
- gases
- have a random arrangement, far apart from each other and move quickly in all other directions in straight lines
- Gases can be compressed as they have large spaces between each other- if you push into the molecules you can fill in the space between them
- have a random arrangement, far apart from each other and move quickly in all other directions in straight lines
- Changes
- A physical change is when the particles are the same but just have a different arrangement and their movement changes.These are reversible changes
- A chemical change is when the particles break up and then join together in another way. These changes are irreversible.
- Limitations of particle model
- Does not show inter molecular forces, size of particles,space between the particles
- solids
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