How does increasing temperature affect gas pressure in a closed container?

Increasing temperature in a closed container directly affects gas pressure due to the kinetic molecular theory. As the temperature rises, the particles of gas gain kinetic energy, moving more rapidly and colliding more forcefully with the walls of the container. These more frequent and harder collisions increase the overall pressure exerted by the gas on the container's walls.

This relationship is described by Gay-Lussac's Law, which states that the pressure of a gas is directly proportional to its absolute temperature (Kelvin) when the volume remains constant. Therefore, as temperature increases, the gas pressure must also increase, leading to the conclusion that higher temperatures result in higher gas pressure within a closed system.