intermolecular forces

What explains the very high melting and boiling point of water

• Strong dipole-dipole bonds between water molecules
• Strong hydrogen bonds between water molecules
• Dispersion forces which are present in all molecules
• Asymmetrical shape of the polar bonds.

All molecules have London forces between them, but dipole-dipole and hydrogen bonding are so much stronger that when they are present we can ignore London forces.  Which of these has ONLY London forces?

• I₂
• NH₃
• OCl₂
• SH₂

Which substance would have the weakest intermolecular forces of attraction?

• CH₄

• NaCl

• H₂O

• MgF₂

Intermolecular forces for: NH₃

• Dispersion Force

• Dipole dipole

• Hydrogen bonding

Intermolecular force present in HCl?

• dipole dipole
• dispersion
• H-bond
• ionic

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

• dipole dipole

• H-bond

• London dispersion

• metallic

Which substance would have the weakest intermolecular forces of attraction?

• CH₄

• NaCl

• H₂O

• MgF₂

Intermolecular forces for: NH₃

• London dispersion Forces

• Dipole dipole

• Hydrogen bonding

Intermolecular forces for: CO₂

• London dispersion Forces

• Dipole dipole

• Hydrogen bonding

The weaker the intermolecular forces of a substance the _____________ the boiling point

• higher

• lower