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A piston-cylinder assembly contains 2 kg of water at 100°C and 100 kPa. The water is...
A constant pressure piston/cylinder has 1 kg of saturated liquid water at 100 kPa. a rigid...
A constant pressure piston/cylinder has 1 kg of saturated liquid water at 100 kPa. a rigid tank contains air at 1200k, 1000 kPa. they are now thermally connected by a reversible heat engine cooling air tank and boiling the water to saturated vapor. Find the required amount of air and the work out of the heat engine.
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
(20%) Q2. A piston-cylinder assembly initially has 100 kPa pressure and 2 liters of air at...
(20%) Q2. A piston-cylinder assembly initially has 100 kPa pressure and 2 liters of air at 25°C. The air is then compressed to 600 kPa pressure and 150°C temperature. Useful work input for compression is 1.2 kJ. Assuming that the ambient pressure and temperature are 100 kPa and 25°C respectively, calculate a) the exergy of the air in the first and last states, b) the minimum work required for the compression process, c) the second law efficiency of the state...
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 well-insulated rigid tank contains 2 kg of a saturated liquid-vapor mixture of water at 100 kPa
A well-insulated rigid tank contains 2 kg of a saturated liquid-vapor mixture of water at 100 kPa. Initially, three-quarters of the mass is in the liquid phase. An electric resistance heater placed in the tank is now turned on and kept on until all the liquid in the tank is vaporized. Determine the entropy change of the steam during this process. Answer: 8.10 kJ/K Analysis From the steam tables (Tables A-4 through A-6)
1. (42 points) A piston-cylinder device contains 6 kg of steam at 100°C with a quality...
1. (42 points) A piston-cylinder device contains 6 kg of steam at 100°C with a quality of 50 percent. This steam undergoes two processes as follows: 1-2 Heat is transferred to the steam in a reversible manner while the temperature is held constant until the steam exists as a saturated vapor. 2-3 The steam expands in an adiabatic, reversible process until the pressure is 15 kPa. (a) (24 points) Fill in the table using the given and determined properties. You...
Problem 3.052 A piston–cylinder assembly contains 2 lb of water, initially at 100 lbf/in.2 and 450°F....
Problem 3.052 A piston–cylinder assembly contains 2 lb of water, initially at 100 lbf/in.2 and 450°F. The water undergoes two processes in series: a constant-pressure process followed by a constant volume process. At the end of the constant-volume process, the temperature is 300°F and the water is a two-phase liquid–vapor mixture with a quality of 40%. Neglect kinetic and potential energy effects. Determine the work and heat transfer for each process, all in Btu.
Problem 3.052 A piston-cylinder assembly contains 2 lb of water, initially at 100 lbf/in.2 and 450°F....
Problem 3.052 A piston-cylinder assembly contains 2 lb of water, initially at 100 lbf/in.2 and 450°F. The water undergoes two processes in series: a constant-pressure process followed by a constant volume process. At the end of the constant-volume process, the temperature is 300°F and the water is a two-phase liquid-vapor mixture with a quality of 50%. Neglect kinetic and potential energy effects. Determine the work and heat transfer for each process, all in Btu
nts) Calculate the change in internal energy during the conversi . (20 poi on of 2 kg of saturated liquid water to saturated vapor i 100 kPa? Assuming heat is added to the piston cylinder in the...
nts) Calculate the change in internal energy during the conversi . (20 poi on of 2 kg of saturated liquid water to saturated vapor i 100 kPa? Assuming heat is added to the piston cylinder in the process, what is the work performed by the piston (boundary work)? What is the required heat in if you assume a heat loss of 50 kJ during the process? Please show work using a T-v AND P-v diagram n a piston cylinder at...
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.
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
(20%) Q2. A piston-cylinder assembly initially has 100 kPa pressure and 2 liters of air at 25°C. The air is then compressed to 600 kPa pressure and 150°C temperature. Useful work input for compression is 1.2 kJ. Assuming that the ambient pressure and temperature are 100 kPa and 25°C respectively, calculate a) the exergy of the air in the first and last states, b) the minimum work required for the compression process, c) the second law efficiency of the state...
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...
1. (42 points) A piston-cylinder device contains 6 kg of steam at 100°C with a quality of 50 percent. This steam undergoes two processes as follows: 1-2 Heat is transferred to the steam in a reversible manner while the temperature is held constant until the steam exists as a saturated vapor. 2-3 The steam expands in an adiabatic, reversible process until the pressure is 15 kPa. (a) (24 points) Fill in the table using the given and determined properties. You...
Problem 3.052 A piston-cylinder assembly contains 2 lb of water, initially at 100 lbf/in.2 and 450°F. The water undergoes two processes in series: a constant-pressure process followed by a constant volume process. At the end of the constant-volume process, the temperature is 300°F and the water is a two-phase liquid-vapor mixture with a quality of 50%. Neglect kinetic and potential energy effects. Determine the work and heat transfer for each process, all in Btu
nts) Calculate the change in internal energy during the conversi . (20 poi on of 2 kg of saturated liquid water to saturated vapor i 100 kPa? Assuming heat is added to the piston cylinder in the process, what is the work performed by the piston (boundary work)? What is the required heat in if you assume a heat loss of 50 kJ during the process? Please show work using a T-v AND P-v diagram n a piston cylinder at...
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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