Question

The temperature of a gas is raised while keeping its volume constant. The pressure exerted by the gas on the walls of the container increases because its molecules

• A. lose more kinetic energy to the wall.
• B. gain more kinetic energy from the wall.
• C. strike the wall more often with higher velocities.
• D. strike the wall less frequently with lower velocities.

Answer 1

The correct option is C strike the wall more often with higher velocities.

Due to increase in temperature, molecules gain more heat energy, get more excited and start more frequent random motion. Due to this, they collide with the walls of the container more often with higher velocities. These collisions develop pressure on the wall. Hence, the pressure exerted by the gas on the walls of the container increases.