A piston-cylinder assembly contains 3 kg of water at 120oC and 1.5 bar. The water is compressed to liquid-vapor mixture state where the pressure is 4 bar, quality 80%. During the compression, there is a heat transfer of energy from the water to its surroundings having a magnitude of 350kJ. Neglecting changes in kinetic energy and potential energy, determine the work, in kJ, for the process of the water. (a) Locate the states on the T-v coordinate and process. ( Draw the graph for T-v) (b)Is this a closed system or an open system? (c)Write your energy balance equation (d)Determine the specific internal energy at state 1 (u1), in kJ/kg (e)Determine the specific internal energy at state 2(u2), in kJ/kg (f)Determine the work for the process, in kJ, and judge the direction of energy flow by the work (into the system or from the system)
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A piston-cylinder assembly contains 3 kg of water at 120oC and 1.5 bar. The water is compressed to liquid-vapor mixture state where the pressure is 4 bar, quality 80%. During the compression, there is a heat transfer of energy from the water to its surroundings having a magnitude of 350kJ. Neglecting changes in kinetic energy and potential energy, determine the work, in kJ, for the process of the water.
(a) Locate the states on the T-v coordinate and process. ( Draw the graph for T-v)
(b)Is this a closed system or an open system?
(c)Write your energy balance equation
(d)Determine the specific internal energy at state 1 (u1), in kJ/kg
(e)Determine the specific internal energy at state 2(u2), in kJ/kg
(f)Determine the work for the process, in kJ, and judge the direction of energy flow by the work (into the system or from the system)
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