Question

Which of the following is not an assumption about the particles in a gas that is made by the kinetic theory?

1) The force of attraction between particles can be ignored.
2) The motion of one particle is not always affected by the others.
3) The particles are in constant, random motion.
4) The location of a particle is predictably determined.

Answer 1

The kinetic-molecular theory of gases does not assume 4. a particle's location can be predictably determined, as gas particles are in constant, random motion.

Step-by-step explanation:

In the context of the kinetic-molecular theory of gases, option 4) "The location of a particle is predictably determined" is not an assumption made by the theory. According to the kinetic theory, the particles of a gas are in constant, random motion, which makes it impossible to predict their exact location at any given time. Instead, the theory assumes that:

• The force of attraction between particles can be ignored.
• The motion of one particle is not affected by the motion of others.
• The particles are in constant, random motion.
• Collisions between particles are perfectly elastic.
• The average kinetic energy of the particles is directly proportional to the temperature of the gas.

These assumptions help in explaining the properties of ideal gases, though they do not hold for real gases which have interactions between molecules and a finite volume.