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# Phase diagrams0

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• p.179 top
• Not in Lab Manual
• ### Phase diagrams0

1. 1. Interparticle Forces and Phase Diagrams Music: “Hold On Loosely” by 38 Special
2. 2. Forces of Chemistry and Physics
3. 3. Interparticle Forces
4. 5. Hydrogen “bridge” page 178 middle
5. 6. Requirements for a Hydrogen “Bond” page 178 bottom
6. 7. Four cases of Hydrogen “Bonding” page 179 bottom
7. 8. Making surfaces more hydrophobic
8. 9. Hydrogen bonding in DNA
9. 10. Inorganic examples of H-bonding
10. 11. Phase Transitions (Phase Changes)
11. 14. Phase Diagrams (especially one-component P vs. T graphs)
12. 16. Temperature vs. heat added graph showing melting point & boiling point -- Boiling point _
13. 17. Heat involved (per gram) in the Phase Changes of Water
14. 18. Phase transitions (Phase changes)
15. 20. Summary of the Information Available in the CO 2 Phase Diagram
16. 21. Value of a Phase Diagram
17. 27. 3-D graph of ideal gas properties
18. 28. A graph of three variables (such as P, V, & T) requires three dimensions and is often a surface rather than a line as for the 2-D graphs. A 3-D Phase diagram (with only one component): A surface representing the properties of a typical pure substance (what a theoretical equation of state would have to account for) Each point on the curving surface represents a set of values of the pressure, temperature, and molar volume that can be attained by this substance.
19. 29. Two-component Phase Diagrams (Temp vs. Composition) Gibbs’ Phase rule for a two-component system: F + P = C + 2, where C=2 so, F + P = 2 + 2 = 4 so, F = 4 – P for one phase (P=1) F=3 which is a space, not restricted to the area of any 2-D graph. for two phases (P=2) F=2 which is an area or surface for three phases (P=3) F=1 which is a line for four phases (P=4) F=0 which must be a point, such as an azeotrope or a eutectic point.