Question: 1. Which of the following conditions occurs as a liquid freezes?

Answer:

Question: 2. Two pots are at the same atmospheric pressure, but one has a lid on it. The pressure above the liquid in pot A is 115 kPa, while the pressure above pot B is 102 kPa. Which pot will boil at a higher temperature?

Answer: A) Pot A will boil at a higher temperature. <=====

B) Pot B will boil at a higher temperature.

C) Both pots boil at the same temperature.

D) The pressure has no effect on boiling point.

Question: 3. The molecular masses of four substances are as follows: A = 16, B = 58, C = 86, D = 116. Which substance will have the lowest boiling point?

Answer: A <=====

B

C

D

Question: 4. In terms of intermolecular forces, explain why atoms and molecules in a liquid move in random patterns.

Answer: A) vibration alone

B) very little molecular motion at all

C) rapid random movement in straight lines alone

====>D) vibration and some linear motion like sliding around

Question: 5. Which factor does not influence whether a substance will be a liquid at room temperature and normal atmospheric pressure?

Answer: A) strength of intermolecular forces

B) molecular shape

C) surface tension <====

D) molecular mass