Question

Which statements describe phase changes? Check all that apply. Particles in a liquid need to move more slowly in order to freeze. Attractive forces overcome the motion of particles when a solid sublimes. Attractive forces between the particles in a liquid are broken when a liquid boils. Particles in gas move fast enough to make more attractive forces when the gas condenses.

Answer 1

The answer is (A) Particles in a liquid need to move more slowly in order to freeze. and (C),Attractive forces between the particles in a liquid are broken when a liquid boils.

Answer 2

Answer: Statements (A), and (C) are correct.

Explanation:

The statements that are true are as follows.

• Particles in a liquid need to move more slowly in order to freeze.

When a liquid freezes the molecules get attracted towards each other. This attraction of particles occurs slowly. Hence, this statement is true.

• Attractive forces between the particles in a liquid are broken when a liquid boils.

When temperature is raised, the molecules in a liquid gains kinetic energy and start to move quickly in random directions. As a result, liquid state changes to gaseous state. Hence, this statement is true.

If the attractive force between gas molecules have to be increased, they should be moving slower instead because moving faster does not help attracting molecules together.

Hence, the statement particles in gas move fast enough to make more attractive forces when the gas condenses is not true.