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Flashcards in Particle Theory Deck (15)
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1
Q

Which state has the least energy?

A

Solid

2
Q

Which state has the most energy?

A

Gas

3
Q

Are particles the same in solids, liquids and gases?

A

Yes

4
Q

Do particles have the same arrangement in solids, liquids and gases?

A

No

5
Q

Describe the arrangement of particles in solids, liquids and gases

A

Solids- particles are held very tightly together
Liquids- particles are close together but can move
Gases- particles are far apart and whiz around a lot

6
Q

In particle theory, gas pressure is due to

A

Particles hitting a surface

7
Q

In particle theory, how do you increase pressure?

A

Increase temperature

Reduce volume

8
Q

In particle theory, what is diffusion?

A

Particles spreading out

9
Q

In particle theory, explain what happens when you change state from solid to liquid to gas

A

…..

10
Q

What is it called when a gas changes to a liquid.

A

Condensation

11
Q

When a gas condenses to a liquid, is heat given out?

A

Yes

12
Q

When a liquid freezes, is heat given out or taken in?

A

Given out

13
Q

Draw heating and cooling curves

A

….

14
Q

Why does the heating curve have flat bits at melting and boiling?

A

At melting or boiling, all the heat energy supplied is used to weaken the forces between particles rather than raising the temperature.

15
Q

Why does a cooling curve have flat bits at condensing and freezing?

A

This is because at condensing and freezing, the forces between particles get stronger - and heat is given out.