* Kinetic Molecular Theory: This theory states that the average kinetic energy of gas molecules is directly proportional to the absolute temperature. This means that at the same temperature, all gas molecules have the same average kinetic energy.
* Kinetic Energy and Molecular Mass: Kinetic energy is related to both mass and velocity. The equation for kinetic energy is KE = 1/2 * mv^2, where KE is kinetic energy, m is mass, and v is velocity.
* Helium vs. Argon: Helium is much lighter than argon (atomic mass of 4 vs. 40). Since they have the same average kinetic energy at the same temperature, the lighter helium atoms must move faster to compensate for their smaller mass.
In simpler terms: Imagine two balls, one very light and one very heavy, rolling down a hill. They both reach the bottom with the same amount of energy, but the lighter ball will be moving much faster.
