Chemistry Ppt. 3

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Author:
DesLee26
ID:
197144
Filename:
Chemistry Ppt. 3
Updated:
2013-02-01 11:22:47
Tags:
CHM 112
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Description:
Liquids, Solids, and Phase Changes
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  1. When dealing with phase changes, how many calculations are there?
    two: heating and phase changes with no change in temperature
  2. Molar Heat of FUsion
    the energy required to melt one mole of a solid
  3. Molar Heat of Vaporization
    the energy required to vaporize one mole of liquid
  4. Molar Heat of Sublimation
    the energy required to sublime one mole of a solid
  5. Vapor Pressure
    the partial pressure of a gas iin equilibrium with liquid at a constant temperature
  6. Only the __ molecules have sufficient __ to escape from the liquid and enter the vapor.
    • faster-movingĀ 
    • kinetic energy
  7. The higher the temperature, the __.
    larger the number of molecules that have enough energy to escape
  8. Boiling Point
    • the temperature at which the vapor pressure of hte gaseous molecuels above its liquid reaches atmospheric pressure
    • - at this point, the liquid and vapor coexist in equilibrium
  9. normal boiling point
    when the atmospheric pressure is exactly one atm
  10. Clausius-Clapeyron Equation
    provides a link between vapor pressure, temperature, and molar heat of vaporizaiton
  11. To change a liquid to a gas, what has to occur?
    the molecule has to break interactions with molecuels around it
  12. When you incresae the temperature, what happens to the vapor pressure?
    increases because more energy is given to liquid molecuels
  13. differnece between evaporation adn boiling
    • rate at which its turning into a gas
    • evaporation is slower
  14. The relationship between vapor pressure and temperature is __
    not linear, but exponential

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