Question

Which is not true about the Kinetic Molecular Theory?

• A. Gas molecules have forces of attraction for each other
• B. Gas molecules move in a random, straight-line motion
• C. Gas molecules have a negligible volume compared to the volume they occupy
• D. Collisions between gas molecules lead to a transfer of energy that is conserved
• E. All of the above statements are correct

Answer 1

The correct option is A Gas molecules have forces of attraction for each other

The kinetic molecular theory is based on the following postulates, or assumptions.

-Gases are composed of a large number of particles that behave like hard, spherical objects in a state of constant, random motion.

-These particles move in a straight line until they collide with another particle or the walls of the container.

-These particles are much smaller than the distance between particles. Most of the volume of a gas is therefore empty space.

-There is no force of attraction between gas particles or between the particles and the walls of the container.

-Collisions between gas particles or collisions with the walls of the container are perfectly elastic. None of the energy of a gas particle is lost when it collides with another particle or with the walls of the container.

-The average kinetic energy of a collection of gas particles depends on the temperature of the gas and nothing else.