Kinetic Theory and Behavior of Matter

General Principles  

- The space between molecules is called intermolecular space.  

- The greater the intermolecular space → weaker the forces of attraction between molecules.  

Behaviour of Matter  

Gases  

1. Molecules are in constant random motion, allowing gases to fill the container.  

2. The motion of molecules is unaffected by others unless they collide.  

3. Forces of attraction between molecules are so weak that they can be ignored.  

Liquids  

1. Molecules can flow to new locations, giving liquids fluidity.  

2. Forces of attraction keep molecules close together, though weaker than in solids.  

Solids

1. Molecules vibrate around fixed positions.  

2. Stronger forces of attraction keep molecules rigidly bound.