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A piston/cylinder setup contains 1 kg of water at 150 kPa, 20-C. 3000 kJ of heat...
3. A piston-cylinder device initially contains 3 kg saturated liquid water at 500 kPa. Now heat...
3. A piston-cylinder device initially contains 3 kg saturated liquid water at 500 kPa. Now heat is transferred to the water until the cylinder contains saturated vapor only. Determine water m = 3 kg p = 500 kPa a) The initial and final volume of the cylinder, b) The boundary work of the piston, and c) The heat added to the system
A cylinder fitted with piston contains 0.2 kg of N2 at 100 kPa and 30°C. The...
A cylinder fitted with piston contains 0.2 kg of N2 at 100 kPa and 30°C. The piston is moved compressing N2 until the pressure becomes 1 MPa and temperature becomes 150°C. The work done during the process is 20 kJ. Determine the heat transferred from N2 to the surroundings. Take Cv = 0.75 kJ/kg K for N2.
A piston-cylinder contains 0.1 kg of water at 1000 kPa and 500 o C. The water is...
A piston-cylinder contains 0.1 kg of water at 1000 kPa and 500 o C. The water is now cooled with a constant force on the piston until it reaches half the initial volume. After it cools to 25 oC while the piston is against the stops. Find the final water pressure (in kPa) and the work in the overall process (in kJ).
2 kg of water is contained in a piston-cylinder setup. The water is initially at a...
2 kg of water is contained in a piston-cylinder setup. The water is initially at a quality of 0.7 and pressure of 300 kPa. The system is heated until the temperature is 200 °C. During this process, the piston is able to move such that the pressure is maintained at 300 kPa. Find the heat transfer in this process, using units of kJ
Question 11 A piston cylinder-device contains 12 kg of steam at 100 kPa and 175°C. Over...
Question 11 A piston cylinder-device contains 12 kg of steam at 100 kPa and 175°C. Over time, the steam in the piston-cylinder device isobarically loses heat to its surroundings until it reaches a temperature of 99.61"C and all the vapor in the piston has condensed into liquid. a. Determine the entropy change of the steam, in kJ/K b. For the steam and its surroundings, determine the total entropy change associated with this process, in kJ/K. The temperature of the surroundings...
A piston-cylinder device initially contains 1.78 kg saturated liquid water at 200°C. Now heat is transferred...
A piston-cylinder device initially contains 1.78 kg saturated liquid water at 200°C. Now heat is transferred to the water until the volume quadruples and the cylinder contains saturated vapor only. Determine (a) the final volume of the tank, m (Round to six decimal places.) (b) the final temperature and pressure, MPa and (c) the internal energy change of the water kJ 0 Water 1.78 kg 200 C
3. (40 pts.) A vertical cylinder fitted with a frictionless piston contains 10 kg of Water...
3. (40 pts.) A vertical cylinder fitted with a frictionless piston contains 10 kg of Water at 0.1 MPa and x = 40%. The system is heated by an external source at 227°C until the specific volume reaches 2.24 m3/kg. The weight of the piston is such that it takes a water pressure of 0.2 MPa for it to start rising 4 (a) Identify the system and draw its boundary (b) Sketch and annotate the overall process on a P-v...
QUESTION 24 A piston-cylinder device contains 50 kg of water at 250 kPa and 25 degree...
QUESTION 24
A piston-cylinder device contains 50 kg of water at 250 kPa and 25 degree C. The cross-sectional area of the piston is 0.1 m2. Heat is now transferred to the water, causing part of it to evaporate and expand. When the volume reaches 0.2 m3 the piston reaches a linear spring whose spring constant is 100 kN/m. More heat is transferred to the water until the piston rises 20 cm more. Determine (a) the final pressure and temperature...
2. A vessel with a piston cylinder attached to a spring (see Figure 1) contains CO2...
2. A vessel with a piston cylinder attached to a spring (see Figure 1) contains CO2 with a volume of 500 L, a pressure of 200 kPa and a temperature of 25degree C (State 1). heat is transferred to the vessel and it starts to expand until the piston just touches the stops. The pressure at this state is 400 kPa and the temperature is 500 degree C (State 2). More heat is added to the vessel until the pressure...
A piston-cylinder device contains 0.78 kg of nitrogen gas at 140 kPa and 37°C. The gas...
A piston-cylinder device contains 0.78 kg of nitrogen gas at 140 kPa and 37°C. The gas is now compressed slowly in a polytropic process during which PV1.3 = constant. The process ends when the volume is reduced by one-half. Determine the entropy change of nitrogen during this process. The gas constant of nitrogen is R= 0.2968 kJ/kg-K. The constant volume specific heat of nitrogen at room temperature is Cr=0.743 kJ/kg-K. (Round the final answer to five decimal places.) The entropy...
3. A piston-cylinder device initially contains 3 kg saturated liquid water at 500 kPa. Now heat is transferred to the water until the cylinder contains saturated vapor only. Determine water m = 3 kg p = 500 kPa a) The initial and final volume of the cylinder, b) The boundary work of the piston, and c) The heat added to the system
2 kg of water is contained in a piston-cylinder setup. The water is initially at a quality of 0.7 and pressure of 300 kPa. The system is heated until the temperature is 200 °C. During this process, the piston is able to move such that the pressure is maintained at 300 kPa. Find the heat transfer in this process, using units of kJ
Question 11 A piston cylinder-device contains 12 kg of steam at 100 kPa and 175°C. Over time, the steam in the piston-cylinder device isobarically loses heat to its surroundings until it reaches a temperature of 99.61"C and all the vapor in the piston has condensed into liquid. a. Determine the entropy change of the steam, in kJ/K b. For the steam and its surroundings, determine the total entropy change associated with this process, in kJ/K. The temperature of the surroundings...
A piston-cylinder device initially contains 1.78 kg saturated liquid water at 200°C. Now heat is transferred to the water until the volume quadruples and the cylinder contains saturated vapor only. Determine (a) the final volume of the tank, m (Round to six decimal places.) (b) the final temperature and pressure, MPa and (c) the internal energy change of the water kJ 0 Water 1.78 kg 200 C
3. (40 pts.) A vertical cylinder fitted with a frictionless piston contains 10 kg of Water at 0.1 MPa and x = 40%. The system is heated by an external source at 227°C until the specific volume reaches 2.24 m3/kg. The weight of the piston is such that it takes a water pressure of 0.2 MPa for it to start rising 4 (a) Identify the system and draw its boundary (b) Sketch and annotate the overall process on a P-v...
QUESTION 24
A piston-cylinder device contains 50 kg of water at 250 kPa and 25 degree C. The cross-sectional area of the piston is 0.1 m2. Heat is now transferred to the water, causing part of it to evaporate and expand. When the volume reaches 0.2 m3 the piston reaches a linear spring whose spring constant is 100 kN/m. More heat is transferred to the water until the piston rises 20 cm more. Determine (a) the final pressure and temperature...
2. A vessel with a piston cylinder attached to a spring (see Figure 1) contains CO2 with a volume of 500 L, a pressure of 200 kPa and a temperature of 25degree C (State 1). heat is transferred to the vessel and it starts to expand until the piston just touches the stops. The pressure at this state is 400 kPa and the temperature is 500 degree C (State 2). More heat is added to the vessel until the pressure...
A piston-cylinder device contains 0.78 kg of nitrogen gas at 140 kPa and 37°C. The gas is now compressed slowly in a polytropic process during which PV1.3 = constant. The process ends when the volume is reduced by one-half. Determine the entropy change of nitrogen during this process. The gas constant of nitrogen is R= 0.2968 kJ/kg-K. The constant volume specific heat of nitrogen at room temperature is Cr=0.743 kJ/kg-K. (Round the final answer to five decimal places.) The entropy...
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