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Question 11 A piston cylinder-device contains 12 kg of steam at 100 kPa and 175°C. Over...
Problem 5- A piston-cylinder device initially contains steam at 3.5 MPa, superheated by .10°C. Now, steam loses hea...
Problem 5- A piston-cylinder device initially contains steam at 3.5 MPa, superheated by .10°C. Now, steam loses heat to the surroundings and the piston moves down, hitting a set of stops, at which point the cylinder contains saturated liquid water. The cooling continues until the cylinder contains water at .200C. Determine the initial temperature of the steam a. b. Sketch the process on a P-v an T-v diagram Determine the initial specific enthalpy, in kJ/kg d. Determine the enthalpy change...
Homework 2 Problem 1: A piston-cylinder device initially contains 0.35-kg steam at 3.5 MPa, superheated by...
Homework 2 Problem 1: A piston-cylinder device initially contains 0.35-kg steam at 3.5 MPa, superheated by 7.4 C. Now the stream loses heat to the surroundings and the piston moves down, hitting a set of stops at which point the cylinder contains saturated liquid water. The cooling continues until the cylinder contains water at 200C. Determine (a) the final pressure and the quality (if mixture), (b) the boundary work, (c) the amount of heat transfer when the piston first hits...
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...
Round your final answers to the nearest integer. A piston-cylinder device contains 4.37 kg of steam...
Round your final answers to the nearest integer. A piston-cylinder device contains 4.37 kg of steam at 100°C with a quality of 60 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) Determine the heat added to the steam in...
A piston –cylinder device initially contains 0.2 kg of steam at 1400 kPa and 350C. The...
A piston –cylinder device initially contains 0.2 kg of steam at 1400 kPa and 350C. The steam is then cooled at constant pressure until it is at 200C. (a) Determine the volume change of the cylinder during this process using the compressibility factor. (b) Compare the result in part (a) to that obtained using actual property values.
A piston–cylinder device initially contains 0.6 m3 of saturated water vapor at 250 kPa. At this...
A piston–cylinder device initially contains 0.6 m3 of saturated water vapor at 250 kPa. At this state, the piston is resting on a set of stops, and the mass of the piston is such that a pressure of 300 kPa is required to move it. Heat is now slowly transferred to the steam until the volume becomes 1.5 m3. Use the data from the steam tables. a) Determine the final temperature. b) Determine the work done during this process. c)...
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 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...
A piston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in...
A piston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kPa. Heat is transferred at constant pressure until the temperature reaches 350°C. Determine: (f) The final mass of the water. H20 P 800 kPa (g) the total change in enthalpy (AH)
(4 points) Steam A spring-loaded piston cylinder initially contains 4.2 kg of steam at 120° C...
(4 points) Steam A spring-loaded piston cylinder initially contains 4.2 kg of steam at 120° C and with a quality of 50%. The device is heated until the pressure of the steam is 500 kPa and the temperature is 200° C. Determine the boundary work done by the steam during this process. 0 kJ Determine the total heat transferred during this process. 0 kJ
Problem 5- A piston-cylinder device initially contains steam at 3.5 MPa, superheated by .10°C. Now, steam loses heat to the surroundings and the piston moves down, hitting a set of stops, at which point the cylinder contains saturated liquid water. The cooling continues until the cylinder contains water at .200C. Determine the initial temperature of the steam a. b. Sketch the process on a P-v an T-v diagram Determine the initial specific enthalpy, in kJ/kg d. Determine the enthalpy change...
Homework 2 Problem 1: A piston-cylinder device initially contains 0.35-kg steam at 3.5 MPa, superheated by 7.4 C. Now the stream loses heat to the surroundings and the piston moves down, hitting a set of stops at which point the cylinder contains saturated liquid water. The cooling continues until the cylinder contains water at 200C. Determine (a) the final pressure and the quality (if mixture), (b) the boundary work, (c) the amount of heat transfer when the piston first hits...
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...
Round your final answers to the nearest integer. A piston-cylinder device contains 4.37 kg of steam at 100°C with a quality of 60 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) Determine the heat added to the steam in...
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...
(4 points) Steam A spring-loaded piston cylinder initially contains 4.2 kg of steam at 120° C and with a quality of 50%. The device is heated until the pressure of the steam is 500 kPa and the temperature is 200° C. Determine the boundary work done by the steam during this process. 0 kJ Determine the total heat transferred during this process. 0 kJ
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