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2 A frictionless piston-cylinder device initially contains 0.5-m2 of air at 200 kPs and 207℃·luri...
An insulated piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of...
An insulated piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of 175 kPa. Water is stirred by a paddle wheel while a current of 8 A flows for 45 min through a-resistor placed in the water. If one-half of the liquid is evaporated during this constant pressure process and the paddle-wheel work amounts to 400 kJ, determine the voltage of the source. Also, show the process on a P-v diagram with respect to saturation lines.
An insulated piston-cylinder device contains 0.1m3 of air (ideal gas) at 400 kPa and 25℃. A...
An insulated piston-cylinder device contains 0.1m3 of air (ideal gas) at 400 kPa and 25℃. A paddle wheel within the cylinder is rotated until 15 kJ of work is done on the air while the pressure is held constant. Assuming the kinetic and potential energies are negligible and the gas constant and specific heat of air are ? = 0.287 kJ kg∙K and ?? = 1.005 kJ kg∙K . Tasks: ( a ) Determine the mass of air inside the...
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...
1/2 Question 3 A piston-cylinder assembly fitted with a paddle wheel contains air, initially at 38°C,...
1/2 Question 3 A piston-cylinder assembly fitted with a paddle wheel contains air, initially at 38°C, 125 kPa, and a volume of 0.02 mº. Energy in the amount of 1.8 kJ is transferred to the air by the paddle wheel. The volume of the air in the piston-cylinder increases to 0.05 mº at constant pressure. If the heat transfer between the air and its surroundings can be ignored, determine (a) the mass of the air in the piston-cylinder (b) the...
A frictionless piston-cylinder device contains air at 300 K and 1 bar and is heated until...
A frictionless piston-cylinder device contains air at 300 K and 1 bar and is heated until its volume doubles and the temperature reaches 600 K. Answer the following: A. You are interested in studying the air in the piston-cylinder device as a closed system. Draw a schematic of your device and the boundary that defines your system. Assume the cylinder is in horizontal position. B. Determine the final pressure of the air at the end of the process, in bar....
A piston–cylinder assembly fitted with a slowly rotating paddle wheel contains 0.19 kg of air, initially...
A piston–cylinder assembly fitted with a slowly rotating paddle
wheel contains 0.19 kg of air, initially at 300 K. The air
undergoes a constant-pressure process to a final temperature of 420
K. During the process, energy is gradually transferred to the air
by heat transfer in the amount 12 kJ.
Assuming the ideal gas model with k = 1.4 and negligible
changes in kinetic and potential energy for the air, determine the
work done by the paddle wheel on the...
A piston-cylinder device contains 0.5 m3 air at 100 kPa and 1000 K. Because the outside...
A piston-cylinder device contains 0.5 m3 air at 100 kPa and 1000 K. Because the outside is cooler (at 300 K), the hot air starts losing heat to the surroundings and the volume of air starts decreasing. Over a certain period of time the volume is observed to shrink by 50%. The final temperature is lower or higher? Determine the boundary work transfer (absolute value). in KJ was W positive and Q negative? or what?
A piston cylinder device contains air with a volume of 0.05 m3 at 25oC and 100...
A piston cylinder device contains air with a volume of 0.05 m3 at 25oC and 100 kPa pressure. The gas is now compressed to a final temperature of 95oC at 250 kPa. This compression is polytropic and follows PVn=constant. a. Determine how much boundary work was added to the gas [in kJ] b. How much heat was added or removed from this system during this process? [in kJ]
Thermodynamics question Initially, 0.05kg of air is contained in a piston cylinder device at 200 °C...
Thermodynamics question
Initially, 0.05kg of air is contained in a piston cylinder device at 200 °C and 1.6 MPa. The air then expands at constant temperature to a pressure of 0.4 MPa. Assume the process occurs slowly enough that the acceleration of the piston can be neglected. The ambient pressure is 101.35kPa. (i) Determine the work (kJ) performed bt the air in the cylinder on the piston. (ii) Determine the work (kJ) performed by the piston on the ambient environment....
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...
An insulated piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of 175 kPa. Water is stirred by a paddle wheel while a current of 8 A flows for 45 min through a-resistor placed in the water. If one-half of the liquid is evaporated during this constant pressure process and the paddle-wheel work amounts to 400 kJ, determine the voltage of the source. Also, show the process on a P-v diagram with respect to saturation lines.
1/2 Question 3 A piston-cylinder assembly fitted with a paddle wheel contains air, initially at 38°C, 125 kPa, and a volume of 0.02 mº. Energy in the amount of 1.8 kJ is transferred to the air by the paddle wheel. The volume of the air in the piston-cylinder increases to 0.05 mº at constant pressure. If the heat transfer between the air and its surroundings can be ignored, determine (a) the mass of the air in the piston-cylinder (b) the...
A piston–cylinder assembly fitted with a slowly rotating paddle
wheel contains 0.19 kg of air, initially at 300 K. The air
undergoes a constant-pressure process to a final temperature of 420
K. During the process, energy is gradually transferred to the air
by heat transfer in the amount 12 kJ.
Assuming the ideal gas model with k = 1.4 and negligible
changes in kinetic and potential energy for the air, determine the
work done by the paddle wheel on the...
Thermodynamics question
Initially, 0.05kg of air is contained in a piston cylinder device at 200 °C and 1.6 MPa. The air then expands at constant temperature to a pressure of 0.4 MPa. Assume the process occurs slowly enough that the acceleration of the piston can be neglected. The ambient pressure is 101.35kPa. (i) Determine the work (kJ) performed bt the air in the cylinder on the piston. (ii) Determine the work (kJ) performed by the piston on the ambient environment....
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