Particle Diagrams
Chemistry: IB Diploma Higher Level, topic 1.7.2
Particle Diagrams
The arrangement of particles in a certain phase can be represented by a diagram. These show simplified particles to illustrate principles.
Solid phase
- Crystalline solids have a regular, ordered, repeating pattern which forms a solid lattice.
- Amorphous solids have a disrupted arrangement but particles are closely associated and hold their shape.
Liquid phase
- Particles are closely associated but do not form a regular lattice.
- Particles are free to fill and match the shape of the container.
- Liquid particles move over each other The arrangement and movement of the particles is dependent on the intermolecular forces between the particles.
Gas Phase
- Particles are much more spread out.
- Particles are very far apart and do not have strong associations.
- Volume is determined largely by the temperature, pressure or container.
- Gas particles are constantly moving.
- Their frequencies of collision and the average spacing between them are dependent on temperature, pressure, and volume.
Test yourself on Particle Diagrams
What phase is being decribed below?
"Particles are closely associated but do not form a regular lattice and are free to fill and match the shape of the container."Which of the following about solids are correct?