Intermolecular Forces of Attraction

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 H₂S have hydrogen bonding?

• Yes

• No

• There is no way to be sure

Does HF have hydrogen bonding?

• yes

• no

• It is impossible to tell

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

What information do we look for on the periodic table if we  want to examine intermolecular forces?

• atomic mass
• atomic number
• electronegativity
• ionization 

Tags

NGSS.HS-PS1-3

If fluorine is stronger then carbon, what charge will the fluorine receive?

• Negative

• Partial negative

• Positive

• Particial positive

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Type of intermolecular force present in HF.

• dipole dipole
• dispersion
• H-bond
• ionic

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

• dipole dipole interactions

• Hydrogen bonding

• London Dispersion Forces

Intermolecular forces are the forces

• within molecules
• between molecules