1. The problem statement, all variables and given/known data Some gas at 300K is enclosed in a container. Now the container is placed on a fast moving train. While the train is in motion what happens to the temperature of the gas? 2. Relevant equations KE(total) = (3/2)(N_A)nkT KE(avg) = 3/2kT 3. The attempt at a solution My answer: My intuition tells me that the temperature of the gas would not change. But I'm a bit confused, since the temperature of the gas is dependent on the kinetic energy of the gas molecules (i.e. increase in their velocity would mean increase in temperature) so wouldn't the container travelling in higher speed increase the velocity of the gas molecules & hence increase the temperature? Or actually the velocity of the gas molecules is measured relative to the container so whether the container moves or not, velocity of molecules remain the same therefore temperature doesnt change?