A rigid tank is divided into two equal parts ( same volume) by a partition. Initially, one side of the tank is filled completely with 5kg of water at 200kPa and 25 degrees celcius, and the other side is evacuated. The partition is then removed, and the water expands into the entire tank. The water is allowed to exchange heat with its surroundings until the temperature in the tank returns to the initial value of 25 degrees celcius. Determine a) the volume of the tank b) the final pressure and c) the heat transfer for this process.