Particle Model, Density and Internal Energy

Question 1

Change of state from solid to liquid

Answer 1

Melting

Question 2

Change of state from liquid to solid

Answer 2

Freezing

Question 3

Change of state from liquid to gas

Answer 3

Boiling

Question 4

Change of state from gas to liquid

Answer 4

Condensation

Question 5

Change of state from solid to gas

Answer 5

Sublimation

Question 6

Movement of particles in a solid

Answer 6

Vibration around a fixed point

Question 7

Movement of particles in a liquid

Answer 7

Free to move around each other

Question 8

Movement of particles in a gas

Answer 8

Constant random motion-going at a range of speeds and directions

Question 9

What happens to the mass of an object when it changes state

Answer 9

Remains constant

Question 10

Are changes in state a physical or chemical change?

Answer 10

Physical

Question 11

Internal Energy

Answer 11

The total kinetic energy and potential energy of all the particles that make up the system

Question 12

How does heating change the energy stored within a system?

Answer 12

By increasing the energy of particles that make up the system, raising the temperature of the system or producing a change of state

Question 13

Equation linking density, mass and volume

Answer 13

p=m divided by v

Question 14

Densest state of matter

Answer 14

Solid

Question 15

Why solid is the densest state of matter

Answer 15

Particles are not free to move