1. Properties of Solids and Liquids
Main Concept:
The different properties of solids and liquids can be explained by differences in their structures, both at the particulate level and in their supramolecular structures.

2. Properties of Solids and Liquids
Properties of Liquids
Reasons for differences in properties

3. - Solids can be:
- crystalline (particles are arranged in a
regular 3-D structure; ex: quartz)
- amorphous (particles do not have a regular,
orderly arrangement; ex: glass)

4. - In both cases, motion of individual particles is limited
- particles do not move significantly with respect to each other
- Main criteria for the structure of solids: interparticle interactions and ability to pack the particles together

5. - Liquids particles are:
- very close to each other
- continually moving and colliding
- particles are able to move significantly with respect to each other and their arrangement
- movement is influenced by the nature and strength of the intermolecular forces that are present.

6. - solid and liquid phases for a particular substance generally have relatively small differences in molar volume because constituent particles are very close to each other

7. - differences in strength of attraction between the particles and/or overall organization explain:
- For liquids, properties such as viscosity, surface tension, and volumes of mixing

8. - differences in strength of attraction between the particles and/or overall organization explain:
- For solids, hardness and macroscopic crystal structure