Two rigid tanks, each of volume 1.0 L, are connected by a valve that is initially closed. Tank A contains 1.0 mol of a monatomic ideal gas at 600 K, while Tank B contains 1.0 mol of the same gas at 300 K. The valve is opened, allowing heat to flow between the tanks until a common final temperature of 450 K is reached. No gas is exchanged and the volumes remain constant. The molar heat capacity at constant volume for the gas is CV=23R.
(1) Calculate the change in entropy of the gas in Tank A.
(2) Calculate the change in entropy of the gas in Tank B.
(3) Determine the total entropy change for the combined system and state whether the process is consistent with the second law of thermodynamics.