Intermolecular Forces. Prentice Hall © 2003Chapter 11 Intermolecular Forces.
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Transcript of Intermolecular Forces. Prentice Hall © 2003Chapter 11 Intermolecular Forces.
![Page 1: Intermolecular Forces. Prentice Hall © 2003Chapter 11 Intermolecular Forces.](https://reader036.fdocuments.net/reader036/viewer/2022082518/56649cfe5503460f949cee53/html5/thumbnails/1.jpg)
Intermolecular Forces
![Page 2: Intermolecular Forces. Prentice Hall © 2003Chapter 11 Intermolecular Forces.](https://reader036.fdocuments.net/reader036/viewer/2022082518/56649cfe5503460f949cee53/html5/thumbnails/2.jpg)
Vapor Pressure and IF
• The stronger the intermolecular forces of the compound, the higher the boiling point of the compound because it will take more energy to break the bonds.
• It therefore follows that the stronger the intermolecular forces, the less volatile the compound will be, which means that its vapor pressure will be low.
![Page 3: Intermolecular Forces. Prentice Hall © 2003Chapter 11 Intermolecular Forces.](https://reader036.fdocuments.net/reader036/viewer/2022082518/56649cfe5503460f949cee53/html5/thumbnails/3.jpg)
Vapor Pressure
• Compounds with high vapor pressure want to turn to gas or vapor. Compound with low VP don’t want to convert to vapor easily unless more energy is added.
• Therefore compounds with LOW VP have High Boiling Points because their intermolecular forces are stronger) and compounds with HIGH VP have LOW Boiling points (because their intermolecular forces are weaker).
![Page 4: Intermolecular Forces. Prentice Hall © 2003Chapter 11 Intermolecular Forces.](https://reader036.fdocuments.net/reader036/viewer/2022082518/56649cfe5503460f949cee53/html5/thumbnails/4.jpg)
Summary
• Strong Intermolecular forces High Boiling Points compounds have LOW VAPOR PRESSURE and are LESS VOLATILE (don’t evaporate easily)
• Weak Intermolecular forces LOW Boiling Points compounds have HIGH VAPOR PRESSURE and are MORE VOLATILE (evaporate easily)