Particle model of matter

Question 1

Properties of a solid?

Answer 1

• Particles close together
• Particles vibrate
• Particles in a regular pattern
• Can’t be squashed
• Do not flow
• Fixed shape
• Fixed volume
• High density

Question 2

Properties of a liquid?

Answer 2

• Particles close together
• Particles move around each other
• Random arrangement
• Can’t be squashed
• Flow
• Fill shape of container
• Fixed volume
• Less dense than a solid but higher than a gas

Question 3

Properties of a gas?

Answer 3

• Particles far apart
• Particles move freely in all directions
• Particles arranged randomly
• Can be squashed
• Can flow
• Fills container
• Volume can change
• Low density

Question 4

What is it called when a solid goes to a liquid?

Answer 4

Melting

Question 5

What is it called when a liquid goes to a solid?

Answer 5

Freezing

Question 6

What is it called when a solid goes to a gas?

Answer 6

Sublimation

Question 7

What is it called when a gas goes to a solid?

Answer 7

Cooling

Question 8

What is it called when a liquid goes to a gas?

Answer 8

Vaporisation/ boiling

Question 9

What is it called when a gas goes to a liquid?

Answer 9

Condensation

Question 10

What is the conservation of mass?

Answer 10

Mass cannot be created or destroyed.

Question 11

What is density?

Answer 11

Mass per unit volume

Question 12

What is density measured in?

Answer 12

Kg/m^3

Question 13

What is the equation for density?

Answer 13

Density= mass/volume

Question 14

How do you find the density of a regular solid?

Answer 14

1) Measure the width, length and height.
2) Measure the mass with an electronic balance.
3) Calculate density.

Question 15

How do you find the density of a liquid?

Answer 15

1) Place measuring cylinder on balance and zero it.
2) Measure 100ml liquid.
3) calculate density.

Question 16

How do you find the density of an irregular solid?

Answer 16

1) Fill a Eureka can to just below spout.
2) Place solid into can and collect displaced water will measuring cylinder.
3) Weigh on a balance.
4) Calculate density.

Question 17

How do objects float?

Answer 17

If the object is less dense that the substance it will float.

Question 18

What is specific latent heat?

Answer 18

The amount of heat required to change the state of 1kg of a substance.

Question 19

What are the two types of SLH?

Answer 19

SLH of fusion (solid to liquid)

SLH of vaporisation (liquid to gas)

Question 20

What is SLH measured in?

Answer 20

J/Kg

Question 21

What is the formula for SLH?

Answer 21

SLH= energy/mass

Question 22

What is internal energy?

Answer 22

The total amount of Kinetic and potential energies in all the molecules of a substance.

Question 23

What is pressure?

Answer 23

The amount of force pushing against a given area.

Question 24

What is temperature?

Answer 24

The measure of the average energy of particles.

Question 25

What is SLH of fusion for water?

Answer 25

When a gas is heated it’s molecules gain more kinetic energy and move faster. The molecules therefore collide with surfaces more frequently and with more force.

Question 26

What is Brownian Motion?

Answer 26

Random jiggling motion of particles in a liquid/solid.