Question

The kinetic-molecular theory of gases assumes which of the following?

1) There are weak but significant interactions between gas molecules.
2) The total amount of energy will change when gas molecules collide.
3) The average kinetic energy of gas molecules will increase when you lower the temperature of the gas.
4) Gas molecules move constantly and in straight lines.

Answer 1

The kinetic-molecular theory of gases assumes that gas particles move in straight lines until they collide, collisions are elastic, there are no forces of attraction or repulsion between particles, and the average kinetic energy is dependent on temperature.

Step-by-step explanation:

The kinetic-molecular theory of gases assumes the following:

1. Gases consist of very large numbers of tiny spherical particles that are far apart from one another compared to their size. The particles of a gas move in straight-line motion until they collide with another particle or with one of the walls of the gas container.
2. Collisions between gas particles and between particles and the container walls are elastic collisions. There is no overall loss of kinetic energy in an elastic collision.
3. There are no forces of attraction or repulsion between gas particles. The motion of each particle is independent of the motion of all other particles.
4. The average kinetic energy of gas particles is dependent upon the temperature of the gas. As the temperature increases, the speeds and kinetic energy of the particles also increase.