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0.15 kg of air in a frictionless piston cylinder at 100 kPa and 600 K is...
A frictionless piston-cylinder device contains 0.2 kg of air at 100 kPa and 27°C. The air...
A frictionless piston-cylinder device contains 0.2 kg of air at 100 kPa and 27°C. The air is now compressed slowly according to the relation P Vk = constant, where k = 1.4, until it reaches a final temperature of 77°C. Sketch the P-V diagram of the process with respect to the relevant constant temperature lines, and indicate the work done on this diagram. Using the basic definition of boundary work done determine the boundary work done during the process [-7.18...
Consider a piston-cylinder device (system) that contains 0.06 m3 of air at 300 kPa and 125...
Consider a piston-cylinder device (system) that contains 0.06 m3 of air at 300 kPa and 125 ̊C. (a) If the volume of air in the device increases to 0.15 m3 while the pressure remains constant, determine the work done by the system during the process. (b) If as a result of heat transfer to the surrounding, the pressure and temperature in the device drop to 240 kPa and 55 ̊C, respectively, and the piston is held such that the volume...
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 assembly initially contains 0.8 kg of air at 100 kPa and 300 K. It...
A piston-cylinder assembly initially contains 0.8 kg of air at 100 kPa and 300 K. It is then compressed in a polytropic process PV3 = C to half the original volume. Assuming the ideal gas model for air and specific heat ratio is constant, k=1.4, determine (a) the final temperature, (b) work and heat transfer, each in kJ. R= 0.287 kJ/kg K. W, 82
A piston - cylinder device contains 0.15 kg of steam at 1 MPa and 320 degree...
A piston - cylinder device contains 0.15 kg of steam at 1 MPa and 320 degree C. The steam now expand to a final state of 150 kPa and 160 degree C. Energy losses via heat transfer from system to surroundings are estimated to be 3KJ, while the contact temperature with the surroundings is 25 degree C.Assuming: T0=25c and P0=100kPa,Determine: A: the available energy of the steam at the initial and final states B: the work done by the system...
A frictionless-piston-cylinder device contains a liquid-vapor mixture of water at 200°C. During a constant- pressure process,...
A frictionless-piston-cylinder device contains a liquid-vapor mixture of water at 200°C. During a constant- pressure process, 500 kJ of heat is transferred to the surrounding air at 20°C. As a result, part of the water vapor contained in the cylinder condenses. a) Draw a schematic of your system including the boundary and all relevant energy transfer. (2 pts) b) Determine the entropy change of the water, in kJ/K. (3 pts) c) For the extended system (system + surroundings), write an...
Patm 100 kPa 1 kg of water is contained in a frictionless piston cylinder device fitted...
Patm 100 kPa 1 kg of water is contained in a frictionless piston cylinder device fitted with two stops. The mass of the piston is 50 kg and the system is open to the atmosphere with Ptm - 100 kPa. The initial temperature of the system Ti Tantal 105 'C and the initial volume V1 Vinitial 1 m3 When the piston reaches the second stop, the volume of the water is doubled (V4Vinal2 Vinitial). Heat is EE transferred between the...
A piston–cylinder device initially contains air at 150 kPa and 27 °C. In this state, the...
A piston–cylinder device initially contains air at 150 kPa and 27 °C. In this state, the piston is resting on a pair of stops, and the enclosed volume is 400 litres. The mass of the piston is such that a 200 kPa pressure is required to move it. The air is now heated until its volume has doubled. Sketch the process on a P-V diagram and determine (a) the mass of air and the final temperature, (b) the work done...
Air in a piston-cylinder device is compressed from 27°C and 100 kPa to 900 kPa by...
Air in a piston-cylinder device is compressed from 27°C and 100 kPa to 900 kPa by following a process with Pv14-const. If air is considered as ideal gas, please determine: (1) The air temperature after compression, (2) The heat transfer into or out of the system
Arigid tank of volume 0.5 m3 is connected to a piston-cylinder assembly by a valve as...
Arigid tank of volume 0.5 m3 is connected to a piston-cylinder assembly by a valve as shown in the diagram below. Both vessels contain pure water. They are immersed in a constant- temperature bath at 200°C and 600 kPa. Consider the tank and the piston-cylinder as- sembly as the system and the constant-temperature bath as the surroundings. Initially the valve is closed, and both units are in equilibrium with the surroundings (the bath). The rigid tank contains saturated water with...
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 assembly initially contains 0.8 kg of air at 100 kPa and 300 K. It is then compressed in a polytropic process PV3 = C to half the original volume. Assuming the ideal gas model for air and specific heat ratio is constant, k=1.4, determine (a) the final temperature, (b) work and heat transfer, each in kJ. R= 0.287 kJ/kg K. W, 82
A frictionless-piston-cylinder device contains a liquid-vapor mixture of water at 200°C. During a constant- pressure process, 500 kJ of heat is transferred to the surrounding air at 20°C. As a result, part of the water vapor contained in the cylinder condenses. a) Draw a schematic of your system including the boundary and all relevant energy transfer. (2 pts) b) Determine the entropy change of the water, in kJ/K. (3 pts) c) For the extended system (system + surroundings), write an...
Patm 100 kPa 1 kg of water is contained in a frictionless piston cylinder device fitted with two stops. The mass of the piston is 50 kg and the system is open to the atmosphere with Ptm - 100 kPa. The initial temperature of the system Ti Tantal 105 'C and the initial volume V1 Vinitial 1 m3 When the piston reaches the second stop, the volume of the water is doubled (V4Vinal2 Vinitial). Heat is EE transferred between the...
Air in a piston-cylinder device is compressed from 27°C and 100 kPa to 900 kPa by following a process with Pv14-const. If air is considered as ideal gas, please determine: (1) The air temperature after compression, (2) The heat transfer into or out of the system
Arigid tank of volume 0.5 m3 is connected to a piston-cylinder assembly by a valve as shown in the diagram below. Both vessels contain pure water. They are immersed in a constant- temperature bath at 200°C and 600 kPa. Consider the tank and the piston-cylinder as- sembly as the system and the constant-temperature bath as the surroundings. Initially the valve is closed, and both units are in equilibrium with the surroundings (the bath). The rigid tank contains saturated water with...
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