Two rigid, insulated tanks are interconnected by a valve. Initially 0.79 kmol of nitrogen at 200 kPa and 255 K fills one tank. The other tank contains 0.21 kmol of oxygen at 100 kPa and 300 K. The valve is opened and the gases are allowed to mix until a final equilibrium state is attained. During this process, there are no heat or work interactions between the tank contents and the surroundings. Determine
(a) The final temperature of the mixture (Tm)
(b) The final pressure of the mixture (pm)
(c) The amount of entropy produced (Sgen) in the mixing process.