States of Matter

Question 1

What is solid –> liquid known as?

Answer 1

• Melting

Question 2

What is liquid –> gas known as?

Answer 2

• Evaporation

Question 3

What is gas –> liquid known as?

Answer 3

• Condenstaion

Question 4

What is liquid –> solid known as?

Answer 4

• Freezing/ solidifying

Question 5

What is solid –> gas known as?

Answer 5

• Sublimation

Question 6

What affects boiling and melting point?

Answer 6

• Forces of attraction between particles

Question 7

What are the limitations to the particle model?

Answer 7

-Particles aren’t solid, mostly empty space
- Many particles aren’t spherical
- There are no forces on the model.

Question 8

What 2 processes can occur at the melting point of a substance?

Answer 8

• Melting
• Freezing

Question 9

What 2 processes can occur at the boiling point of a substance?

Answer 9

• boiling/ evaporation
• Condensation

Question 10

Why is there no change in the temperature of a substance during the melting/ boiling phase?

Answer 10

• All energy used to break intermolecular forces.
• NOT to increase the kinetic energy of particles.

Question 11

True or False. During the melting phase, more energy is needed to expand the particles.

Answer 11

False. All energy needed to reach melting point ( expanding particles) has been supplied.

Question 12

When can the temperature rise again after the melting phase?

Answer 12

• Temperature can rise once substance is fully melted.

Question 13

What happens to a solid when you heat it?

Answer 13

1.) Particles gain KE
2.) Particles expand until mpt is reached.

Question 14

If a substance has strong intermolecular forces, what would its mpt and bpt be like?

Answer 14

• High mpt and bpt.

Question 15

What does the nature of particles depend on?

Answer 15

• The nature of the particles involved
  depends on the type of bonding and the structure of the substance.

Question 16

True or False
When I melt ice, I break the strong covalent bonds in the compound?

Answer 16

• False.
  You break the intermolecular forces

Question 17

What affects the nature of particles?

Answer 17

• The bonds between them
• The structure

Question 18

What can particle theory help explain?

Answer 18

• Particle theory can help to explain melting, boiling, freezing and condensing.

Question 19

How are particles represented in the simple particle model?

Answer 19

• The particles are represented as solid spheres.

Question 20

TRUE OR FALSE

A silver atom has the same properties as a silver cloth.

Answer 20

• False
• Atoms themselves donnot have the bulk properties of materials.