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Intermolecular Force
CHM2046
| Question | Answer |
|---|---|
| What is the compressibility for a solid? | small |
| What is the compressibility for a liquid? | small |
| What is the compressibility for a gas? | large |
| What is the thermal expansion for a solid? | small |
| What is the thermal expansion for a liquid? | small |
| What is the thermal expansion for a gas? | moderate |
| What are the phases of matter for a gas? | high energy (high temperature), big distance between particles (they don't interact), particles move fast |
| What are the phases of matter for a liquid? | moderate energy (temp between gas and solid), short distance between particles (they interact), some movement |
| What are the phases of matter for a solid? | low energy (lowest temperature), very short distance, interactions between molecules sufficient to keep molecules in place |
| What is vaporization? | liquid to gas |
| What is condensation? | gas to liquid |
| What is melting? | solid to liquid |
| What is freezing? | liquid to solid |
| What is the ΔH of melting and vaporization? | positive |
| What is the ΔH of condensation and freezing? | it is negative ΔH of vaporization and melting |
| What is sublimation? | solid to gas |
| What is deposition? | Gas to solid |
| What is the ΔH of sublimation? | positive |
| What is the ΔH of deposition? | it is negative ΔH of sublimation |
| Any molecule that has only one of ___, ___, ___, or ___ is polar | N, O, F, CL |
| Any molecule that has only C's and H's is _____ | nonpolar |
| Chemical bonds are ______, ______, and has _________ | covalent, ionic, relatively strong bonds |
| Intermolecular forces are weaker than __________ and is an attraction between molecules | chemical bonds |
| What are the intermolecular forces from strongest to weakest? | ion-dipole, hydrogen bond, dipole-dipole, london dispersion forces |
| What is a dipole-dipole? | The force between two polar molecules |
| What is a hydrogen bond? | When one molecule has either H-F, H-O, H-N bonds or the molecule has N, O, F atoms |
| What is an ion-dipole? | it only happens in solution, you need ions in solution, and a solution that is made of polar molecules |
| What is an example of an ion-dipole? | The forces between NaCL and H2O |
| Ionic bonds require what? | one metal and one nonmetal |
| What is a london dispersion force? | when non-polar molecules can be polarized without an external force |
| Every combination of molecules has what force? | london dispersion forces |
| Do larger atoms polarize more readily? Y or N | Y |
| The more "______" a molecule is the greater the london disperson forces | spread out |
Created by:
Lavernee
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