1. Solids and Liquids By Ryan Dolinsky and Dave Manion

2. Properties of Solids • Molecules held close together • Intermolecular forces lock molecules in place • Not compressible because the atoms have little free space

3. Crystalline Solids • Characteristic geometric shape • Sharp melting point • Physical Properties are different in different directions (Anisotropy)

4. Amorphous Solids • No definite geometrical shape • Melt over a wide range of temperature • Physical Properties are the same in different directions (isotropic)

5. Summary of Solids • Retain their own shape and volume • Virtually incompressible • Do not flow • Diffusion within a solid occurs extremely slowly

6. Liquids • Properties • Assumes shape of the portion of the container it occupies • Does not expand to fill container • Virtually incompressible • Flows readily • Diffusion within a liquid occurs slowly

7. Intermolecular Attractive Forces • Strong enough to hold molecules close together • Causes liquids to be more dense and far less compressible than gases • Have a definite volume • Attractive forces are not strong enough to prevent molecules from moving pass one another • Explains how liquids can be poured and fill containers

8. Determining States • Depends on balance between kinetic energies of particles and interparticle energies of Attraction. • Kinetic- depends on temp, tend to keep particles apart and moving • Interparticle- force drawing particles together