Question

Check all of the following that are not postulates in the kinetic molecular theory of gases, as presented in the textbook. You should check anywhere from one to six boxes.

a) Gases consist of molecules in constant random motion
b) Collisions between gas molecules are elastic
c) Gases occupy definite volumes
d) Gases have negligible volumes

Answer 1

The postulates of the kinetic molecular theory of gases include the assumption that gas particles are in constant rapid motion, collisions between gas particles are elastic, there are no forces of attraction or repulsion between gas particles, and the average kinetic energy of gas particles is dependent upon the temperature of the gas.

Step-by-step explanation:

The postulates of the kinetic molecular theory of gases are as follows:

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 may be either atoms or molecules.
2. Gas particles are in constant rapid motion in random directions. The fast motion of gas particles gives them a relatively large amount of kinetic energy.
3. Collisions between gas particles and between particles and the container walls are elastic collisions. An elastic collision is one in which there is no overall loss of kinetic energy.
4. There are no forces of attraction or repulsion between gas particles. Attractive forces are responsible for particles of a real gas condensing together to form a liquid.
5. The average kinetic energy of gas particles is dependent upon the temperature of the gas. As the temperature of a sample of gas is increased, the speeds of the particles are increased.