1.1 - Kinetic Molecular Theory

Question 1

What does the kinetic molecular theory explain?

Answer 1

The difference in physical properties of the three states

Question 2

What are the states of matter?

Answer 2

1. solid
2. liquid
3. gas
4. plasma

Question 3

What are the states of matter characterized by?

Answer 3

Different energies of the particles

Question 4

Properties of solid matter?

Answer 4

• Particles are closely packed
• Inter-particles force = strong
• Particles vibrate in position
• Fixed shape and volume

Question 5

Properties of liquid matter?

Answer 5

• Particles more spaced
• Inter-particle forces = weaker
• Particles can slide over each other
• No fixed shape
• Fixed volume

Question 6

Properties of gas matter?

Answer 6

• Particles are fully spread out
• Inter-particle forces = negligible
• Particles move freely
• No fixed shape or volume

Question 7

What is the inter-particle force?

Answer 7

Force that exists between the particles relative to this average kinetic energy

Question 8

What does the inter-particle force determine?

Answer 8

The state of matter at a given temp and pressure

Question 9

How does the inter-particle forces determine state of matter?

Answer 9

If the inter-particle forces are suffiently strong to keep particles in position at a given temp and pressure = solid, if not = liquid or gas

Question 10

What are fluids referred to?

Answer 10

Gasses and liquids

Question 11

What is diffusion?

Answer 11

Process by which particles of a substance spread out evenly

Question 12

How does diffusion occur?

Answer 12

As a result of their random movements

Question 13

What is a solute?

Answer 13

Less abundant component

Question 14

What Is a solvent?

Answer 14

More abundant component

Question 15

When does a solid change into a liquid?

Answer 15

At melting point

Question 16

When does a liquid change into a gas?

Answer 16

At boiling point

Question 17

What is sublimation?

Answer 17

Direct inter-conversion of a solid to a gas w/out becoming a liquid

Question 18

What is deposition?

Answer 18

Direct inter-conversion of a gas to a solid w/out becoming a liquid

Question 19

What are the two processes which a liquid can turn into a gas by?

Answer 19

Evaporation and boiling

Question 20

When does boiling occur?

Answer 20

Occurs at a fixed temp for a given pressure
- When bubbles of gas form throughout the liquid

Question 21

When does evaporation happen?

Answer 21

Occurs only at surface and takes place over a range of temps below the boiling point