Chemistry Spring Semester Final Exam Review

Intermolecular forces are:

• Forces that exist between molecules.

• Forces that exist within a molecule.

• Forces that exist only in solids.

• Forces that exist only in gases.

Tags

NGSS.HS-PS1-3

As intermolecular forces increase, the melting point ________________ the boiling point ________________ the surface tension ________________

• increases, increases, increases.

• decreases, decreases, decreases.

• increases, decreases, increases.

• decreases, increases, decreases.

As the size of molecules increase, the intermolecular forces:

• get stronger

• get weaker

• remain the same

• disappear

Identify the type of IMF in the first picture

• Hydrogen Bonding

• London Dispersion Forces

• Dipole-Dipole

• None

Identify the type of IMF in the second picture

• Hydrogen Bonding

• London Dispersion Forces

• Dipole-Dipole

• None

Identify the type of IMF in the 3rd picture

• Hydrogen Bonding

• London Dispersion Forces

• Dipole-Dipole

• None

Rank the IMF from strongest to weakest

• Hydrogen-->Dipole-dipole --> London Dispersion

• London --> Dipole--> Hydrogen

• Dipole--> Hydrogen-->London

• hydrogen--> London --> Dipole

Occurs in: All molecules

• Strength: Weakest IMF

• increases as # of electrons increase

• Hydrogen

• Dipole

• London Dispersion

• IMFs are the same as covalent bonds.

Tags

NGSS.HS-PS1-3

• Occurs in: Polar molecules

• Cause: Attraction between permanent positive and negative ends of polar molecules

• Strength: Stronger than London, but weaker than hydrogen bonds

• Hydrogen

• Dipole

• London Dispersion

• IMFs are the same as covalent bonds.

• Occurs in: Molecules where H is bonded to N, O, or F

• Cause: Strong attraction between a hydrogen atom and a lone pair on another N, O, or F

• Strength: Strongest IMF

• Hydrogen

• Dipole

• London Dispersion

• IMFs are the same as covalent bonds.