1. Entry Task: March 23 rd Friday Question: For the following, place the following in increasing order of IMF. C 5 H 12 C 8 H 18 C 3 H 8 You have ~7 minutes

2. Agenda: Discuss Ch. 13.2-13.3 worksheet Notes on Phases- Section 4 HW: Ch. 3 section 4 ws

3. Intramolecular force Intermolecular force Weak force due to the shifting of electron clouds between molecules/particles

4. Identical nonpolar molecules When molecule/compound have a permanent positive end and negative end Attraction between molecules whose opposite ends are attracted

5. Strong IMF between hydrogen and highly EN atoms (FON) with lone pairs of electrons H-Bonding Dispersion Dipole 2 Dispersion, Dipole-dipole, and hydrogen bonding

6. true tightly Intermolecular

7. Decreases true More An amorphous

9. I Can… Section -4 *Explain how energy added or removed to substances can change their phase and Explain a phase diagram.

10. Write down-

11. Order Less energy Less order More energy Chaos Most energy Taking in energy (endothermic) Releases energy (exothermic) Taking in energy (endothermic) Releases energy (exothermic) Releases energy (exothermic) Taking in energy (endothermic)

12. The Energy Sequence Endothermic process- requires energy from surroundings Melting- solid to liquid Vaporization- liquid to gas Sublimation- solid to gas

13. The Energy Sequence Exothermic process- releases energy to the surroundings Freezing- liquid to solid Condensation- gas to liquid Deposition- gas to solid

14. Solid Liquid Gas Melting  Freezing Vaporization   Condensation Sublimation  Deposition Triple point Critical Point

15. Click in white area- Phase diagram movie

17. What do they mean? Border lines- show temp/pressure when 2 phases can coexist. Triple point- temp/pressure at which 3 phases can coexist. Critical point- temp/pressure which water cannot exist as a liquid anymore.

18. Homework: Backside of notes- Interpreting phase diagrams & Ch. 13.4 worksheet