A rigid tank is divided into two equal parts by a partition. Initially, one side of the tank contains 2 kg of water at250 kPa and 30°C, while the other side is evacuated. The partition is then removed, and the water expands intothe entire tank. The water is allowed to exchange heat with its surrounding until the temperature in the tankreturns to the initial value of 30°C. Determine (a) the volume of the tank (in m³), (b) the final pressure (in kPa)and (c) the change in internal energy per unit mass (in kJ/kg).

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