Intermolecular Forces (IMF)

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

Intermolecular forces for: NH₃

• Dispersion Force

• Dipole dipole

• Hydrogen bonding

Intermolecular force present in HCl?

• dipole dipole
• dispersion
• H-bond
• ionic

Ionic Bonding involves...

• The transfer of protons
• The transfer of nuetrons 
• The transfer of electrons
• None Of the above

Which substance has the weakest intermolecular forces?

• Substance A, boiling point of 75 °C

• Substance B, boiling point of 105 °C

• Substance C, boiling point of 25 °C

• Substance d, boiling point of 45 °C

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

• higher

• lower

London forces are stronger in heavier atoms or molecules, and weaker in lighter atoms or molecules.  Which of these has the strongest London forces?

• F₂
• Br₂
• I₂
• Cl₂

What type of forces will the following molecule have?

• dispersion forces
• dipoles
• hydrogen bonding