Kinetic Theory

Question 0

How are the particles arranged in a solid?

Answer 0

Very closely packed - they cannot move

Question 1

How are the particles arranged in a liquid?

Answer 1

Closely packed but can move around

Question 2

How are the particles arranged in a gas?

Answer 2

Totally random arrangement, not touching but constantly moving around

Question 3

Which state of matter has the largest forces between its particles?

Answer 3

Solid

Question 4

Which state of matter has the weakest forces between its particles?

Answer 4

Gas

Question 5

When a solid is heated and it melts, what happens to the temperature?

Answer 5

At the melting point, all of the thermal energy is used to break the bonds and so the temperature remains the same until all of the solid has melted

Question 6

Why does a bathroom mirror mist up on a cold day?

Answer 6

The glass is cold so any water vapour in the air will condense

Question 7

When a liquid evaporates it cools - why?

Answer 7

For evaporation to take place the fastest moving particles need to leave the surface. When this happens the average kinetic energy of the remaining particles goes down, and therefore the temperature goes down.