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Boiling and Freezing

Boiling and Freezing. Chapter 14. Boiling. The process in which a liquid changes phase to a gas. Boiling Point. The temperature at which, under “Standard” conditions, a liquid will change into a gas. Boiling Point.

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Boiling and Freezing

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  1. Boiling and Freezing Chapter 14

  2. Boiling • The process in which a liquid changes phase to a gas.

  3. Boiling Point • The temperature at which, under “Standard” conditions, a liquid will change into a gas.

  4. Boiling Point • At the boiling point, the vapor pressure of the liquid will equal the outside atmospheric pressure. • No longer will the atmosphere “Hold” the liquid down (or in) and the liquid “Jumps” out of the container as a gas.

  5. Boiling Point • The vapor pressure is determined by the number of solute particles, and the colligative properties of the solution.

  6. Boiling Point • To increase the boiling point, add more solute. • ΔTb = Kb * m

  7. Boiling Point • ΔTb = Kb * m • ΔTb = elevation of BP • Kb = molal constant • m = molality

  8. Boiling Point • Chart page 500 • Chart page 501

  9. Freezing point depression • ΔTf= Kf* m

  10. Freezing point depression • You can figure it out…

  11. Freezing point depression • Chart page 502

  12. Video • Ice-Ice Baby • https://www.youtube.com/watch?v=25SHX5Sj7ZA • Slip sliding away • https://www.youtube.com/watch?v=Wp2sqrfGSPI • ??? • https://www.youtube.com/watch?v=ST1fUaKIBMs

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