Final answer:
The total energy remains the same in collisions between gas particles because these collisions are elastic and do not involve a loss of energy.
Step-by-step explanation:
The total energy remains the same in collisions between gas particles. These collisions are elastic, meaning there is no net loss of energy from the collisions. The average kinetic energy of the gas molecules is directly proportional to the absolute temperature, and the average kinetic energy of the molecules of different gases is the same at the same temperature.