3.1 IMF's (Jeremy Krug)

What is the primary difference between intermolecular and intramolecular forces?

• Intermolecular forces affect reactivity, while intramolecular forces affect physical properties.

• Intermolecular forces are weaker and make molecules stick together, while intramolecular forces are stronger and hold atoms within a molecule.

• Intermolecular forces are covalent bonds, while intramolecular forces are ionic bonds.

• Intermolecular forces occur within a single molecule, while intramolecular forces occur between different molecules.

What causes London dispersion forces?

• Permanent dipole-dipole interactions between polar molecules.

• The temporary lopsided distribution of electrons in an atom or molecule.

• The sharing of electrons between two atoms.

• The transfer of electrons between a metal and a nonmetal.

How does an instantaneous dipole in one atom affect a nearby atom?

• It causes the nearby atom to form a permanent dipole.

• It repels the electrons in the nearby atom, creating an induced dipole.

• It leads to the formation of a covalent bond between the two atoms.

• It has no effect on nonpolar atoms.

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What type of molecules exhibit London dispersion forces?

• Only nonpolar molecules.

• Only polar molecules.

• Only ionic compounds.

• All molecules.

What factor primarily determines the strength of London dispersion forces?

• The molecule's polarity.

• The number of electrons in the molecule.

• The molecule's bond type.

• The molecule's melting point.

Organize the three substances by relative boiling point

Groups:

(a) Highest Boiling point

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(b) Middle Boiling Point

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(c) Lowest Boiling Point

• He

• Ar

• C3H8