Intermolecular Forces Flashcards
(40 cards)
What are London dispersion forces?
Weak intermolecular forces arising from temporary dipoles in molecules.
Are London dispersion forces stronger in larger or smaller molecules?
Stronger in larger molecules due to increased polarizability.
True or False: London dispersion forces are present in all molecules.
True.
What type of intermolecular force occurs between polar molecules?
Dipole-dipole interactions.
Fill in the blank: Dipole-dipole interactions are generally _____ than London dispersion forces.
stronger.
What is a hydrogen bond?
A strong type of dipole-dipole interaction that occurs between a hydrogen atom and a highly electronegative atom.
Name three elements that commonly participate in hydrogen bonding.
Fluorine, oxygen, and nitrogen.
True or False: Hydrogen bonds are weaker than dipole-dipole interactions.
False.
What is the primary factor that determines the strength of London dispersion forces?
Molecular size and shape.
Which type of intermolecular force is responsible for the unique properties of water?
Hydrogen bonds.
Fill in the blank: The strength of hydrogen bonds can be affected by _____ and _____.
temperature; pressure.
How do dipole-dipole interactions differ from London dispersion forces?
Dipole-dipole interactions occur between polar molecules, while London dispersion forces arise from temporary dipoles.
Which intermolecular force is typically the weakest?
London dispersion forces.
Multiple Choice: Which of the following has the strongest intermolecular forces? A) London dispersion forces B) Dipole-dipole interactions C) Hydrogen bonds
C) Hydrogen bonds.
What role do London dispersion forces play in noble gases?
They are the only type of intermolecular force present in noble gases.
Fill in the blank: Hydrogen bonds are crucial for the _____ structure of proteins.
secondary.
True or False: Dipole-dipole interactions can occur in nonpolar molecules.
False.
How does temperature affect hydrogen bonding in water?
Increased temperature can weaken hydrogen bonds.
What is the effect of molecular size on London dispersion forces?
Larger molecules have stronger London dispersion forces.
Multiple Choice: Which property of water is primarily due to hydrogen bonding? A) High boiling point B) Low density C) Solubility in oil
A) High boiling point.
Fill in the blank: The presence of _____ increases the strength of dipole-dipole interactions.
polar bonds.
True or False: Hydrogen bonds are only found in organic compounds.
False.
What is the primary characteristic of a polar molecule?
It has a permanent dipole moment.
How do intermolecular forces affect boiling points?
Stronger intermolecular forces result in higher boiling points.
