Question

Which of the following assumptions is not part of the kinetic theory?

Options:
A. All matter is made up of tiny, invisible particles.
B. The particles are always moving.
C. Particles move faster at higher temperatures.
D. Particles are smaller at lower pressure.

Answer 1

The assumption that is not part of the kinetic theory is that particles are smaller at lower pressure.

Step-by-step explanation:

The kinetic theory of matter, specifically as it applies to gases, has several assumptions. These include:

1. Gases consist of very large numbers of tiny spherical particles that are far apart from one another compared to their size.
2. Gas particles are in constant rapid motion in random directions.
3. Collisions between gas particles and between particles and the container walls are elastic collisions.
4. There are no forces of attraction or repulsion between gas particles.
5. The average kinetic energy of gas particles is dependent upon the temperature of the gas.

Among the options provided, the assumption that is not part of the kinetic theory is option D: Particles are smaller at lower pressure. The kinetic theory does not make any assumptions about the size of gas particles changing with pressure.