Question

In the kinetic molecular theory of gases, which of the following statements is true about the average speed ?

• A. Most of the molecules are moving at the average speed
• B. Any given molecule moves at the average speed most of the time
• C. When the temperature increases, more of the molecules will move at the new average speed
• D. When the temperature increases, fewer molecules will move at the new average speed
• E. When the temperature increases, the average speed decreases

Answer 1

The correct option is D When the temperature increases, fewer molecules will move at the new average speed

When the temperature increases, fewer molecules will move at the new average speed.
Temperature affects the individual particles inside the molecules.
As you increase the temperature, the particles gain more kinetic energy and start to move faster, which effectively speeds up the molecules.