As shown in the figure, there is a rigid insulated piston cylinder. The insulated baffle divides the inside of the cylinder into two chambers, I and II. The right side of the piston is connected to the environment. There is an electric heating wire in the II chamber, which can be energized to heat the gas. The initial state of the gas in the piston barrel is as shown in the figure. (1) If the electric heating wire is energized, the gas in II will be heated and expand, and the adiabatic piston will move slowly. Taking the gas in II as the system, find the T of the final state of the gas in II when the electric heating wire generates 1 kJ of heat, as well as the W, ?U, ?H, and ?S of this process (6 points) (2) If the adiabatic piston is fixed, use an electric heating wire to heat the gas in II to 400K. After the insulating baffle is removed, the gases in I and II will mix. Taking all the gases in I and II as the system, find the T of the final state, and the W, ?U, ?H, ?S of the mixing process (6 points)