Intermolecular Forces Review

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.

Does HCl have hydrogen bonding?

• yes
• no

Does CH₄ have hydrogen bonding?

• yes
• no

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

Strongest I ntermolecular force for: NH₃

• Dispersion Force

• Dipole dipole

• Hydrogen bonding

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

• higher

• lower

Intermolecular forces for: CO₂

• Dispersion Force

• Dipole dipole

• Hydrogen bonding

Rank these in order of strength:
covalent bond
London forces
hydrogen bond
dipole-dipole attraction

• dipole-dipole>covalent bond>hydrogen bond>London
• London>dipole-diple>hydrogen bond>covalent bond
• covalent bond>hydrogen bond>dipole-dipole>London
• hydrogen bond>dipole-dipole>London>covalent bond

Which of the following factors plays an important role in the identification of specific intermolecular forces in a molecule?

• bond type
• density
• solubility
• molecular polarity

Which of the following molecules has hydrogen bonding?

• HCl
• HI
• HF
• HBr