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An insulated piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of...
(a) An insulated piston cylinder device contains 5 L of saturated liquid water at a constant...
(a) An insulated piston cylinder device contains 5 L of saturated liquid water at a constant pressure of 150 kPa. The cylinder was equipped with the electric heater inside it. The liquid is heated at constant pressure until it becomes saturated vapour. Determine the entropy change of the water during this process in kJ/K. (10 Marks) (b) A stream of refrigerant R134a enters a steady flow device at 100 kPa, 50 °C at a rate of 1 kg/s. Two streams...
QUESTION 3 A 0.25m of saturated liquid refrigerant-134a at 80°C is contained in frictionless insulated piston-cylinder...
QUESTION 3 A 0.25m of saturated liquid refrigerant-134a at 80°C is contained in frictionless insulated piston-cylinder device as shown in Figure Q2(b). A paddle-wheel is placed inside the cylinder chamber to stir the refrigerant-134a and the paddle wheel transfer a total work of 245 kJ to the fluid. Moreover, a 440 V and 9 amp of resistor is also placed inside the cylinder chamber to heat the refrigerant-134a. With the aid of a P-V diagram, determine the time taken for...
2 A frictionless piston-cylinder device initially contains 0.5-m2 of air at 200 kPs and 207℃·luri...
2 A frictionless piston-cylinder device initially contains 0.5-m2 of air at 200 kPs and 207℃·luring the process. Air is stirred by a paddle wheel at į00 kJ while the pressure remains constant during the process. A heat loss of 85 kJ occurs and an electric energy of 50 kJ through a resistor is placed in the eylinder (a) Write the assumptions (b) Show the 1 law of thermodynamies for the control volume (c) Determine the mass of air in the...
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...
A frictionless piston-cylinder device contains a saturated liquid-vapor mixture of water at 373K. During a constant...
A frictionless piston-cylinder device contains a saturated liquid-vapor mixture of water at 373K. During a constant pressure process, 600 kJ of heat is transferred to the surrounding air at 300K. Asa result, part of the water vapor contained in the cylinder condenses. Determine (1) the entropy change of the water, (2) the entropy change of the air (3) the total entropy generation during this process.
5. (25 Pts) Water in a piston-cylinder device exists as a saturated liquid at a pressure...
5. (25 Pts) Water in a piston-cylinder device exists as a saturated liquid at a pressure of 2.0 MPa (2000 kPa). Heat is then added to complete this process such that the final temperature of the water is 500 °C. Determine the following: a. What phase is the water in at State 2? b. If V1 = 2 m3, what is the mass of water [kg] in the piston-cylinder device? c. Show the process on a T-v diagram. Clearly label...
A piston-cylinder device contains 5 kg of saturated water liquid at 0.3 MPa. Heat is transferred...
A piston-cylinder device contains 5 kg of saturated water liquid at 0.3 MPa. Heat is transferred at constant pressure until the temperature reaches 500 -C. (84 marks) a) What is the initial temperature of the system? b) What is the initial quality x? c) What is the initial specific enthalpy of the system? d) What is the final state? e) Show the process on a P-v diagram with respect to the saturation line. 1) What is the final specific enthalpy?...
A piston cylinder device initially contains 1.2kg of saturated liquid water at 220oC. Now, heat is...
A piston cylinder device initially contains 1.2kg of saturated liquid water at 220oC. 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, (b) the final temperature (c) the final pressure, and (d) the change in internal energy of the tank. To check your work, enter the final pressure in kPa in the box below. Also, sketch this process on a T-v diagram.
3. (5 pts) An insulated, vertical piston-cylinder device initially contains 2 kg of water at 70°C....
3. (5 pts) An insulated, vertical piston-cylinder device initially contains 2 kg of water at 70°C. The mass of the piston is such that it maintains a constant pressure of 400 kPa inside the cylinder. Water at 1000 kPa and 500°C is allowed to enter the cylinder from a supply line until the instant that the last. drop of liquid in the cylinder vaporizes. Determine the mass of the steam that has entered.
Saturated water vapor which is initially at 500 kPa is contained in a piston-cylinder device arranged...
Saturated water vapor which is initially at 500 kPa is contained in a piston-cylinder device arranged to maintain a constant temperature. The piston is now moved until the water becomes a saturated liquid. How much work and how much heat (in kJ/kg) are transferred during this process?
(a) An insulated piston cylinder device contains 5 L of saturated liquid water at a constant pressure of 150 kPa. The cylinder was equipped with the electric heater inside it. The liquid is heated at constant pressure until it becomes saturated vapour. Determine the entropy change of the water during this process in kJ/K. (10 Marks) (b) A stream of refrigerant R134a enters a steady flow device at 100 kPa, 50 °C at a rate of 1 kg/s. Two streams...
QUESTION 3 A 0.25m of saturated liquid refrigerant-134a at 80°C is contained in frictionless insulated piston-cylinder device as shown in Figure Q2(b). A paddle-wheel is placed inside the cylinder chamber to stir the refrigerant-134a and the paddle wheel transfer a total work of 245 kJ to the fluid. Moreover, a 440 V and 9 amp of resistor is also placed inside the cylinder chamber to heat the refrigerant-134a. With the aid of a P-V diagram, determine the time taken for...
2 A frictionless piston-cylinder device initially contains 0.5-m2 of air at 200 kPs and 207℃·luring the process. Air is stirred by a paddle wheel at į00 kJ while the pressure remains constant during the process. A heat loss of 85 kJ occurs and an electric energy of 50 kJ through a resistor is placed in the eylinder (a) Write the assumptions (b) Show the 1 law of thermodynamies for the control volume (c) Determine the mass of air in the...
A frictionless piston-cylinder device contains a saturated liquid-vapor mixture of water at 373K. During a constant pressure process, 600 kJ of heat is transferred to the surrounding air at 300K. Asa result, part of the water vapor contained in the cylinder condenses. Determine (1) the entropy change of the water, (2) the entropy change of the air (3) the total entropy generation during this process.
5. (25 Pts) Water in a piston-cylinder device exists as a saturated liquid at a pressure of 2.0 MPa (2000 kPa). Heat is then added to complete this process such that the final temperature of the water is 500 °C. Determine the following: a. What phase is the water in at State 2? b. If V1 = 2 m3, what is the mass of water [kg] in the piston-cylinder device? c. Show the process on a T-v diagram. Clearly label...
A piston-cylinder device contains 5 kg of saturated water liquid at 0.3 MPa. Heat is transferred at constant pressure until the temperature reaches 500 -C. (84 marks) a) What is the initial temperature of the system? b) What is the initial quality x? c) What is the initial specific enthalpy of the system? d) What is the final state? e) Show the process on a P-v diagram with respect to the saturation line. 1) What is the final specific enthalpy?...
3. (5 pts) An insulated, vertical piston-cylinder device initially contains 2 kg of water at 70°C. The mass of the piston is such that it maintains a constant pressure of 400 kPa inside the cylinder. Water at 1000 kPa and 500°C is allowed to enter the cylinder from a supply line until the instant that the last. drop of liquid in the cylinder vaporizes. Determine the mass of the steam that has entered.
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