Particle Model Of Matter

Question 1

3 features of solid particles

Answer 1

Density is highest due to particles being closest together
Don’t have much energy so can only vibrate about their fixed postions
Strong forces of attractions hood particles together in fixed aggrangement

Question 2

3 features of liquid particles

Answer 2

There are weaker forces of attraction
They move in random directions at low speeds and are generally less dense than solids

Question 3

3 features of gas particles

Answer 3

Almost no forced of attraction between particles
Free to move travel in random directions at high speeds
Have low densities

Question 4

That’s is density the measure of

Answer 4

Compactness

Question 5

What is the process of turning a solid into gas

Answer 5

Sublimating

Question 6

How can a change in state occur

Answer 6

If the substance is heated enough the particles will have enough energy in their kinetic energy stores to break the bond holding them together

Question 7

How can a state change from cooling

Answer 7

The particles loose energy and form bonds

Question 8

How do you find the density of solid objects

Answer 8

1)use a balance to measure mass
2)find volume of object
3)find volume by eureka can, water displaced by object will be transfers to measuring cylinder
The volume of water in measuring cylinder =volume of object
Then use equation to find density

Question 9

How do you find density of liquid

Answer 9

Place measuring cylinder on balance and zero it
Pour 10 ml into measuring cylinder and record liquids mass
Pour another 10 into measuring cylinder and record total volume and mass
Repeat UNTILL cylinder is full
Take an Adverage of density’s and get an accurate density of liquid

Question 10

What energy store do particles that vibrate and move around have

Answer 10

Kinetic energy

Question 11

What does heating a system do to the particles

Answer 11

Particles move around faster increasing internal energy

Question 12

What is specific latent heat

Answer 12

Specific latent heat of a substance is the amount of energy needed to change 1kg. Of it from one state to another without changing temp

Question 13

What does a specific latent heat graph look like

Answer 13

Rising -solid
Flat-melting
Rising again -liquid
Flat again-boiling
Rising again -gas

Decreasing-gas
Flat-condensing
Decreasing again-liquid
Flat again-freezing
Decreasing again-solid

Question 14

What creates pressure

Answer 14

Colliding gas particles

Question 15

What is pressure and how is it formed

Answer 15

Forces exerted per area
When gas particles collide with something they exert a force on it