Chapter 10 PPt. 2

  1. Characteristics and strength of:
    • moderate
    • occurs between ions and polar solvents
  2. Characteristics and strength of:
    • weak
    • occurs between polar molecules
  3. Characteristics and strength of:
    london dispersion
    • weak
    • occurs between all molecules; strenght depends on size, polarizability
  4. Characteristics and strength of:
    hydrogen bond
    • moderate
    • occurs between molecules with O-H, N-H, and F-H
  5. Why don't the boiling points of NH3, H2O, and HF not follow the trend of increasing boiling points with increasing molecular mass down a gorup of hte periodic table
    due to Hydrogen bonds the boiling point has to be higher to break the bonds
  6. What us surface tension and why does it occur?
    • resistance of a liquid to spread out and increase its surface area
    • due to tighter attraction at the surface
  7. Viscosity
    Relationship with temperature
    • measure of a liquid's resistance to flow
    • Increase temperature, decrease viscosity
  8. What's one common way of getting from ne phase to another?
    temperature change: breaking weak interactiosn; adding kinetic energy to additional molecules
  9. What is enthalpy?
    Temp adn entropy relationship
    • heat content of materials
    • increase temp, increase entropy
  10. Solid to a liquid
    fusion (melting)
  11. What does frost resemble?
    a crystalline appearance
  12. Phase changes
    a change in physical form but not the chemical identity of a substance
  13. liquid to gas
  14. gas to liquid
  15. liquid to solid
  16. solid to gas
  17. Molar Heat of Fusion
    energy required to melt one mole of a solid in kJ
  18. Molar Heat of Vaporization
    the energy required to vaporize one mole of liquid
Card Set
Chapter 10 PPt. 2
Liquids, Gases, and Phase Changes