A tank used for filling helium balloons has a volume of 0.300 m3 and contains 2.00 mol of helium gas at 20.0°C.

Assume that the helium behaves like an ideal gas.

(A) What is the total translational kinetic energy of the gas molecules?

(B) What is the average kinetic energy per molecule?


What if the temperature is raised from 20.0°C to 40.0°C? Because 40.0 is twice as large as 20.0, is the total translational energy of the molecules of the gas twice as large at the higher temperature?