1. The problem statement, all variables and given/known data A container has neon gas in the temperature 273 K. We heat the container to the temperature 373 k, keeping the volume constant. Find the average velocity of the molecules of neon before and after the heat. 2. Relevant equations U=3/2vRT 3. The attempt at a solution I thought to us the formula U=3/2vRT but I don't have delta U.