A rigid, well-insulated tank contains air. A partition in the tank separates 12 ft of air at 14.7 lbf/in., 40F from 10 ft of air at 50 lbf/in., 200F, as illustrated in Fig. P6.46. The partition is removed and air from the two sides mix until a final equilibrium state is attained. The air can be modeled as an ideal gas, and kinetic and potential energy effects can be neglected. Determine the final temperature, in F, and pressure, in lbf/in. Calculate the amount of entropy produced, in Btu/R. Air VL = 12 ft PL = 14.7 lbf/in.2 TL = 40F - FIGURE P6.46 Air VR = 10 ft PR = 50 lbf/in. TR = 200F Air P2, T