Intermolecular Forces (Leaving Cert Chemistry): Flashcards
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Intramolecular bonding
Intramolecular bonding
Bonding within a molecule (e.g., covalent bonds)
Intermolecular forces
Intermolecular forces
Forces of attraction between separate molecules
Van der Waals forces
Van der Waals forces
Weak intermolecular forces that exist between all molecules
Discoverer of van der Waals forces
Discoverer of van der Waals forces
Johannes van der Waals (Dutch scientist)
How strong are van der Waals forces vs. covalent/ionic bonds?
How strong are van der Waals forces vs. covalent/ionic bonds?
Van der Waals are much weaker
Molecules with van der Waals forces
Molecules with van der Waals forces
All molecules (polar & non-polar)
Physical properties affected by van der Waals
Physical properties affected by van der Waals
Boiling points, melting points, solubility
How does distance affect van der Waals forces?
How does distance affect van der Waals forces?
Strength decreases greatly as distance increases
London dispersion forces characteristics
London dispersion forces characteristics
Weakest type; present between all molecules
Cause of London dispersion forces
Cause of London dispersion forces
Temporary fluctuations in electron distribution
Hydrogen bonding occurrence
Hydrogen bonding occurrence
H bonded to O, N, or F
Ion-dipole forces occurrence
Ion-dipole forces occurrence
Between ions and polar molecules