Q4 An Insulated Vertical Piston Cylinder Device Initially Contains 15 Kg Of Water 8 Kg Of Which Is In The Vapor Phase 1 (40.07 KiB) Viewed 51 times
Q4 An Insulated Vertical Piston Cylinder Device Initially Contains 15 Kg Of Water 8 Kg Of Which Is In The Vapor Phase 2 (49.84 KiB) Viewed 51 times
Q4. An insulated, vertical piston-cylinder device initially contains 15 kg of water, 8 kg of which is in the vapor phase. Initially the pressure is 200 kPa inside the cylinder. A linear spring is connected to the piston therefore the pressure changes linearly with volume (P-m.V+ b). Super heated steam at 0.5 MPa and constant temperature is allowed to enter the cylinder from a supply line until all the liquid in the cylinder has just vaporized and the pressure and volume in the cylinder have both doubled. For this problem you must use property tables (from the textbook). Determine the mass of the steam that has entered during this process.
Q5. An insulated, vertical piston-cylinder device initially contains 17 kg of water, 5 kg of which is in the vapor phase. Initially the pressure is 200 kPa inside the cylinder. A linear spring is connected to the piston therefore the pressure changes linearly with volume (P-m. V + b). Super heated steam at 0.5 MPa and constant temperature is allowed to enter the cylinder from a supply line until all the liquid in the cylinder has just vaporized and the pressure and volume in the cylinder have both doubled. For this problem you must use property tables (from the textbook). Determine the boundary work (in kJ) associated with the system during this process. Negative sign must be included if work is done to the system.
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