A tank of volume 0.413 m3 contains 2.79 mol of helium gas at 5C. Assume that the helium behaves like as an ideal gas. The universal gas constant is 8.31451 J/Kmol, and Boltzmann's constant is 1.38066 x10^-23 J/K. Find the total thermal energy of the system. Answer in units of J. Would the right equation be Eint = 3/2NKbT =3/2nRT ?