- A Well Insulated Piston Cylinder System Figure Q2 Contains 5 L Of Saturated Liquid Water The Piston Has A Diameter An 1 (119.32 KiB) Viewed 54 times
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A well-insulated piston-cylinder system (Figure Q2) contains 5 L of saturated liquid water. The piston has a diameter and mass of 0.30 m and 15 kg respectively. The system is placed at an area where the atmospheric pressure is at 86 kPa. The water is stirred by a paddle wheel while a current of 10 A flows for 45 min through a resistor placed in the water. piston Water shaft W. Figure Q2 a) Determine the initial pressure of the water. What is the initial state of the water? (4 marks) b) Determine the initial mass of the water in the cylinder. (4 marks) c) If one-half of the liquid is evaporated during this constant-pressure process and the paddle-wheel work amounts to 300 kJ, determine the voltage of the source. (9 marks) d) Determine the final volume of the water and show the process on a P-v diagram with respect to the saturation lines. (8 marks) [Total: 25 marks] W a.) Anitial pressure of the water. Pin = Patm + (mg)psiton. Apiston = 86 + 15x9.81 88.08 kPa. Pin. x(0.3)2 x 1000