Two rigid tanks, shown in Fig. P6.97, each contains 10 kg N₂ gas at 1000 K, 500 kPa. They are now thermally connected to a reversible heat pump, which heats one tank and cools the other, with no heat transfer to the surroundings. When one tank is heated to 1500 K, the process stops. Find the final (P, T) in both tanks and the work input to the heat pump, assuming constant heat capacities.

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OB H.P. A N2 N2 W FIGURE P6.97