Question

Based on the kinetic molecular theory, which of the following statements is correct about a sample of gas at a constant temperature and volume? The net kinetic energy of its particles decreases due to collisions. The net kinetic energy of its particles increases due to collisions. It has a constant average kinetic energy. Its average kinetic energy is always zero.

Answer 1

It has a constant average kinetic energy.

Answer 2

It has a constant average kinetic energy is the correct statement.

Explanation:

• The kinetic theory of gases state that a gas contains an enormous number of atoms/molecules. These atoms/molecules are in continuous motion.
• The volume of the molecules is very less (almost negligible) as compared to the volume in which gas is contained.
• Energy is transferred between them when they collide with each other, but the avg. K.E reamins constant for a contant temperature of gas.
• Therefore, the statement It has a constant average kinetic energy is correct.