IMF Review

Intermolecular forces are the forces

• within molecules

• between molecules

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.

What is vapor pressure

• the amount of energy required to evaporate

• the amount of energy required to boil

• the force per unit area exerted by the gaseous layer above a liquid

• the force per unit area exerted by a liquid on the gaseous layer above it

Which substance will have the highest vapor pressure

• CH3CH2CH2CH2CH2CH3

• H2O

• CH4

• CH3F

How will the following molecule bond with itself?

• Dispersion
• Dipole
• Hydrogen bond

What forces will the following molecule have?

• dispersion
• dipole
• hydrogen bonding

What type of forces will the following molecule have?

• dispersion forces
• dipoles
• 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

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

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

• higher

• lower