Search


	Podcast:		4. Chemistry and Physics
	Episode:		Gases
	Category:		Science & Medicine
	Duration:		00:01:07
	Publish Date:		2011-07-13 19:55:34
	Description:		Transcript: Gases are typically at higher temperature and much lower density than liquids or solids. The process by which a liquid becomes a gas is called vaporization. In a gas the chains between atoms and molecules are broken. The atoms and molecules move freely in straight lines with occasional collisions. As an analogy for the differences between solids, liquids, and gases, consider people standing in a gymnasium. If the people are packed densely in a gymnasium with arms linked, that’s like the situation of a solid where the atoms are locked in chains and cannot move. If the people are moving freely but still packed in the gymnasium, moving one amongst the other, that’s like the case of a liquid where the atoms and molecules can move freely, but the density is still high. If the gymnasium instead only has a few dozen people moving in straight lines blindly, occasionally colliding with each other, that’s the analog situation for a gas.
	Total Play:		0