A piston-cylinder assembly contains 0.5 kg of water. Initially, the piston is resting against the stops...
A piston-cylinder assembly contains 0.5 kg of water. Initially, the piston is resting against the stops when the water pressure and temperature are 1.00 bar and 125 degrees celsius, respectively. The piston has a mass of 50 kg and face area of 0.01 m^2; local atmospheric pressure is 1.01 bar; local gravitational acceleration is 9.81 m/s^2.
1. What water pressure would be required to lift the piston from the stops?
2. If the initial specific internal energy is 2544.86 kJ/kg, how much heat transfer must occur to the water in order to begin to lift the piston from the stops?
3. If the piston continues to move smoothly until the water volume doubles, how much work is done by the water on the surroundings?
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