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.

Hydrogen bonding occurs when hydrogen is bonded to N, O, or F.  Which of the following has hydrogen bonding?

• CBr₄
• NO₂
• H₂S
• NH₃

Does CH₄ have hydrogen bonding?

• yes
• no

Intermolecular forces for: CO₂

• Only London Dispersion Forces

• Dipole dipole and London Dispersion Forces

• Hydrogen bonding and London Dispersion Forces

Hydrocarbons will have which type of intermolecular forces?

• Dispersion
• dipole
• hydrogen bonds

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

• dipole dipole
• H-bond
• dispersion
• metallic

Intermolecular forces are the forces

• within molecules
• between molecules

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

• higher

• lower

What is the best explanation for why BrF3 is soluble in water?

• The lone pairs on the Br can dissolve in water.

• BrF3 is polar and will form dipole-dipole forces with water.

• BrF3 is polar and will form hydrogen bonds with water.

• BrF3 is nonpolar and will form only LDFs with water.

Does HCl have hydrogen bonding?

• yes
• no