When you say "the gas in this container is 100'C," that is a statement about the vibration and motion of the molecules which constitute that gas. To say somethi

When you say "the gas in this container is 100'C," that is a statement about the vibration and motion of the molecules which constitute that gas. To say something is hot or cold is to say that the average molecule in that substance has or lacks kinetic energy. Therefore, temperature is a description of the kinetic motion in a system, and so it emerges from position and velocity. Source: also an amateur