4-3 Intermolecular Forces 2022

Intermolecular forces are the forces

• within molecules
• between molecules

Rank the intermolecular forces in increasing order (weakest to strongest)

• dipole-dipole, london dispersion, Hydrogen bonding

• London Dispersion, Hydrogen-Bonding, Dipole-Dipole

• London Dispersion, Dipole-Dipole, Hydrogen-Bonding

• Hydroben Bonding, dipole-dipole, London dispersion

Nonpolar covalent molecules always have _______________forces between them.

• London Dispersion

• Dipole=Dipole

• Hydrogen Bonding

• All three

London dispersion forces are the weakest because...

• The atoms always have the same electronegativity values.

• The atoms have a large electronegativity difference between eachother.

• It is only a temporary uneven distribution of electrons.

• They are polar molecules

Answer explanation

London dispersion is always between nonpolar molecules, which have a weaker attraction than polar molecules since the electronegativity difference is small. (>0.5). In polar molecules, the dipole moment is present, centers of positive and negative charge.

Type of intermolecular force present in HF.

• dipole dipole

• London dispersion

• Hydrogen bonding

• ionic

Type of intermolecular force present in I₂, Br₂, and Cl₂.

• Dipole dipole

• Hydrogen bond

• London dispersion

• metallic

H₂S has what kind of intermolecular force?

• dipole dipole

• London dispersion

• Hydrogen bond

• ionic

Intermolecular force present in HCl?

• dipole dipole
• dispersion
• H-bond
• ionic

Which substance would have the weakest intermolecular forces of attraction?

• CH₄

• NaCl

• H₂O

• MgF₂

Intermolecular forces for: CO₂

• London Dispersion Force

• Dipole dipole

• Hydrogen bonding