9.1 States of Matter

Question 1

What are the 3 SOM? [3]

Answer 1

• Solid
• Liquid
• Gas

Question 2

What is the physical process from solid to liquid called? [1]

Answer 2

Melting

Question 3

What is the physical process from liquid to gas called? [1]

Answer 3

Boiling/Evaporating

Question 4

What is the physical process from gas to liquid called? [1]

Answer 4

Condensation

Question 5

What is the physical process from liquid to solid called? [1]

Answer 5

Freezing

Question 6

What is the physical process from solid to gas called? [2]

Answer 6

Sublimation

Question 7

What is the physical process from a gas to solid called? [2]

Answer 7

Deposition

Question 8

What is the arrangement in a solid? [4]

Answer 8

Close together, fixed pattern, organised structure, lattice

Question 9

What is the arrangement in a liquid? [2]

Answer 9

Close, irregular pattern

Question 10

What is the arrangement in a gas? [3]

Answer 10

Far apart, no pattern, no structure

Question 11

What is the movement like in a solid? [1]

Answer 11

Particles vibrate

Question 12

What is the movement like in a liquid? [1]

Answer 12

Free to move

Question 13

What is the movement like in a gas? [1]

Answer 13

Free to move

Question 14

How strong are the intermolecular forces in a solid? [1]

Answer 14

Strong

Question 15

How strong are the intermolecular forces in a liquid? [1]

Answer 15

Fairly strong/ Medium/ fairly weak

Question 16

How strong are the intermolecular forces in a gas? [1]

Answer 16

Weak

Question 17

In which SOM is there a definite shape? [1]

Answer 17

Solid

Question 18

In which SOM is there a definite volume? [2]

Answer 18

• Solid
  -Liquid

Question 19

Which SOM are NOT compressible? [2]

Answer 19

• Solid
• Liquid

Question 20

What happens when the physical process ‘MELTING’ happens? [2]

Answer 20

Forces between particles weaken, they’re no longer regularly arranged but still close, can move freely now

Question 21

What happens when the physical process ‘BOILING’ happens? [2]

Answer 21

Forces between particles weaken, particles become far apart

Question 22

What happens when the physical process ‘CONDENSATION’ happens? [2]

Answer 22

Forces between particles increase, particles become close together but can still move freely

Question 23

What happens when the physical process ‘FREEZING’ happens? [2]

Answer 23

Forces between particles increase, particles become fixed in position

Question 24

What are the fluid SOM? [2]

Answer 24

• Liquid
• Gas

Question 25

What are intermolecular forces? [1]

Answer 25

Forces that act between particles and hold them together. They get weaker when heated.

Question 26

What is DIFFUSION? [2]

Answer 26

The movement of particles from a region of higher concentration to a region of lower concentration, the particles are eventually evenly spread out.

Question 27

What is BROWNIAN MOTION? [1]

Answer 27

Random movement of particles

Question 28

What cause pressure in a gas? [1]

Answer 28

Particles colliding with the walls of the container.

Question 29

What happens to the volume and pressure if a gas is heated in a container which CAN expand? [2]

Answer 29

• Volume increases
• Pressure decreases
• Because more there’s more space in the container which means it’s less likely to hit a wall.

Question 30

What happens to the volume and pressure if a gas is heated in a container which can NOT expand? [2]

Answer 30

• Volume stays the same
  = Because it’s neither increasing or decreasing
• Pressure increases
  = Because it’s getting heated which means more energy which means more particles colliding with walls.

Question 31

How does RELATIVE MOLECULAR MASS affect the rate of diffusion? [2]

Answer 31

• When it’s higher = rate of diffusion is slower
• When it’s lower = rate of diffusion is quicker