According to the kinetic molecular theory, how do the particles in a gas move?

• A. They move in circular orbits around the center of the container.
• B. They rotate around a central axis.
• C. They move in straight lines until they collide with another particle or the walls of the container.
• D. They vibrate in fixed positions.

Answer: (C)

Verified step by step guidance

1. Recall the basic postulates of the kinetic molecular theory related to gas particles' motion.
2. Understand that gas particles are in constant, random motion and travel in straight lines between collisions.
3. Recognize that when gas particles collide with each other or the container walls, these collisions are elastic, meaning no energy is lost.
4. Note that gas particles do not move in circular orbits, rotate around a central axis, or vibrate in fixed positions; these motions are characteristic of other states of matter or molecular behavior.
5. Conclude that the correct description is that gas particles move in straight lines until they collide with another particle or the walls of the container.