One kmol of argon at 320 K is initially confined to one side of a rigid, insulated container divided into equal volumes of 0.2 m3 by a partition. The other side is initially evacuated. The partition is removed and argon expands to fill the entire container. Using the RG model (L-K charts), determine (a) the final temperature (T2) of argon. (b) What-if Scenario: What would the final temperature be if PG model were used?