Water is initially at 150°C and a pressure of 1000 kPa. The volume in the container is sloWater is initially at 150°C and a pressure of 1000 kPa. The volume in the container is slowly increased, causing the pressure to decrease, until the pressure is 80 kPa. The saturation pressure of water at 150°C is 475.8 kPa. The temperature of the water is maintained at 150°C through the process. Show the process on a P-v diagram, and describe what happens to the water during the process.wly increased, causing the pressure to decrease, until the pressure is 80 kPa. The saturation pressure of water at 150°C is 475.8 kPa. The temperature of the water is maintained at 150°C through the process. Show the process on a P-v diagram, and describe what happens to the water during the process.
What will be an ideal response?
Initially, the water is a compressed liquid. As the pressure is decreased at constant temperature, the volume expands. When the pressure drops to 475.8 kPa, the water begins to boil, at constant pressure. Once the water is all in vapor form, the water will resume expanding but with a decreasing pressure.
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