NGSS Alignment: HS-PS3-2 (Macroscopic energy from microscopic motion)
Gay-Lussac's Law states that the pressure of a fixed mass of gas is directly proportional to its absolute temperature, provided the volume remains constant ($P \propto T$).
In this simulation, you can control the temperature of a rigid, fixed-volume container. As you increase the temperature, the kinetic energy of the gas particles increases, causing them to move faster and collide with the container walls more frequently and with greater force, resulting in an increase in pressure.