ch8 review

Question 1

List the three intermolecular forces, and rank them according to their strength

Answer 1

From Strongest to weakest:
Hydrogen Bond
Dipole Force
London Force

Question 2

Explain how dipole forces form.

Answer 2

Partial Postitive Charge of one polar molecule is attracted to partial negative of another polar molecule

Question 3

What types of molecules will form hydrogen bonds?

Answer 3

Molecules with H covalently bonded to N, O, or F

Question 4

Explain how London forces form

Answer 4

Some e- randomly move closer to others through random movement of e-. For a brief instant, a partial negative charge forms (instanteneous dipole). Those attract to induced dipoles (which are also instantaneous.)

Question 5

Why is oxygen gas (O2) a gas at room temperature?

Answer 5

Nonpolar molecule, only has weak London Forces, which aren’t strong enough to hold it as a solid or liquid

Question 6

Why is water (H2O) a liquid at room temperature?

Answer 6

Polar molecule with strong hydrogen bonds to hold molecules together in liquid form

Question 7

Why is salt (NaCl) a solid at room temperature?

Answer 7

Ionic compound with strong hydrogen bonds to hold molecules together in liquid form

Question 8

Name N2O5

Answer 8

DiNitrogen PentOxide

Question 9

What are resonance structures?

Answer 9

When you can draw a dot diagram in different ways