The Key Idea: The size of the individual particles (atoms or molecules) does not change when a liquid turns into a gas.
What Changes:
* Spacing: The primary difference is the spacing between the particles. In a liquid, particles are close together and can move around each other, but they are still relatively tightly packed. In a gas, the particles are much farther apart and move freely.
* Motion: The motion of the particles increases significantly when a liquid turns into a gas. The added energy from heating causes the particles to vibrate faster and break free from their liquid state.
Why the size of particles doesn't change:
* Atoms and Molecules: Atoms and molecules are the fundamental building blocks of matter. They don't change size just because they change states.
* Phase Changes: Phase changes (solid to liquid, liquid to gas) are about the arrangement and movement of these particles, not the particles themselves.
Important Note:
* Closed Container: In a closed container, the gas will exert pressure on the walls as the particles bounce around. This pressure will increase as the temperature rises and the particles move faster.
Let me know if you have any more questions about the states of matter!
