An isolated gas tank is divided into two equal partitions separated by an impermeable membrane. One side of the membrane is filled with gas, and the other side is vacuum. The membrane between the two partitions breaks. At the end of the process, the temperature and pressure are uniform throughout the gas tank. Calculate the final temperature, final pressure, and the change in entropy if the filled partition in the tank initially contains ideal gas at $32$ MPa and $400\backslash$deg C$,$ with a constant specific heat capacity of Cp$=29\mathrm{.}3$ J$/$mol$$K$.$