Intermolecular Forces Post-Lecture Flashcard

Front

What is a hydrogen bond?

Back

A hydrogen bond is a type of intermolecular force that occurs when a hydrogen atom covalently bonded to a highly electronegative atom (like oxygen, nitrogen, or fluorine) is attracted to another electronegative atom.

Front

What are intermolecular forces (IMFs)?

Back

Intermolecular forces (IMFs) are forces of attraction or repulsion between neighboring particles (molecules, atoms, or ions) that influence the physical properties of substances.

Front

What is the only intermolecular force present between nonpolar molecules?

Back

London dispersion forces (LDF) are the only intermolecular forces present between nonpolar molecules.

Front

What type of molecules exhibit dipole-dipole interactions?

Back

Dipole-dipole interactions occur between polar molecules, which have permanent dipoles due to differences in electronegativity.

Front

What is the significance of permanent dipoles in molecules?

Back

Permanent dipoles in polar molecules lead to stronger intermolecular forces, affecting properties like boiling and melting points.

Front

What are London dispersion forces?

Back

London dispersion forces are weak intermolecular forces that arise from temporary dipoles in molecules, occurring in all types of molecules but are the only forces in nonpolar molecules.

Front

What is the relationship between intermolecular forces and boiling points?

Back

Stronger intermolecular forces generally result in higher boiling points, as more energy is required to separate the molecules.

Front

What is the role of intermolecular forces in liquids?

Back

Intermolecular forces in liquids determine their viscosity, surface tension, and ability to dissolve other substances.

Front

How do hydrogen bonds affect water's properties?

Back

Hydrogen bonds in water lead to its high specific heat, surface tension, and unique density properties, such as ice being less dense than liquid water.

Front

What is the difference between ionic bonds and intermolecular forces?

Back

Ionic bonds are strong attractions between charged ions, while intermolecular forces are weaker attractions between neutral molecules.