Unit 11 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.

Tags

NGSS.MS-PS1-4

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

• CBr₄
• NO₂
• H₂S
• NH₃

Does HF have hydrogen bonding?

• yes
• no

Which is the second strongest intermolecular force, after hydrogen bonding?

• dipole-dipole attraction
• London forces

Tags

NGSS.HS-PS1-3

In general, substances with stronger intermolecular forces have ___________  boiling points than those with weaker intermolecular forces

• higher
• lower

Tags

NGSS.HS-PS1-3

H₂S has what kind of intermolecular force?

• dipole dipole
• dispersion
• H-bond
• ionic

Intermolecular forces are the forces

• within molecules
• between molecules

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

• dipole dipole
• H-bond
• dispersion
• metallic

Conversion Factor 1kcal = ___ cal

• 10
• 100
• 1000
• 1/1000

Conversion Factor  1 cal = ____J

• 10
  1000
• 1
• 4.184
• 4184