Which of the following is NOT an assumption of the kinetic-molecular theory of gases?

• A. Gas particles are in constant, random motion.
• B. The volume of individual gas particles is negligible compared to the total volume of the container.
• C. Collisions between gas particles are perfectly elastic.
• D. Gas particles experience strong attractive and repulsive forces.

Answer: (D)

Verified step by step guidance

1. Recall that the kinetic-molecular theory of gases is based on several key assumptions that describe ideal gas behavior.
2. List the main assumptions: (1) Gas particles are in constant, random motion; (2) The volume of individual gas particles is negligible compared to the container volume; (3) Collisions between gas particles are perfectly elastic; (4) There are no forces of attraction or repulsion between gas particles.
3. Analyze the given options and compare them to the assumptions: the first three options align with the theory's assumptions.
4. Identify that the statement 'Gas particles experience strong attractive and repulsive forces' contradicts the assumption that there are no intermolecular forces in an ideal gas.
5. Conclude that the statement about strong attractive and repulsive forces is NOT an assumption of the kinetic-molecular theory of gases.