According to the kinetic molecular theory, what causes a gas to exert pressure on the walls of its container?

• A. The gravitational force acting on gas particles
• B. The attraction between gas particles
• C. The rotation of gas molecules
• D. The collisions of gas particles with the container walls

Answer: (D)

Verified step by step guidance

1. Recall the kinetic molecular theory, which explains the behavior of gases based on the motion of their particles.
2. Understand that gas particles are in constant, random motion and move in straight lines until they collide with something.
3. Recognize that gas pressure is caused by the force exerted when gas particles collide with the walls of their container.
4. Note that gravitational forces and attractions between particles are negligible in ideal gases and do not directly cause pressure.
5. Conclude that the pressure exerted by a gas is due to the collisions of gas particles with the container walls, transferring momentum and creating force per unit area.