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(20 points) A piston cylinder device contains 3kg of nitrogen initially at 250k Pa and 50C....
(20 points) A piston cylinder device contains 3kg of nitrogen initially at 250k Pa and 50C. The nitrogen is now compressed slowly in a polytropic process during which PV1.3= constant until the volume is reduced by one half. Determine the work done and the heat transfer for this process. Use R=0.298kJ/kgK and c = 0.744k.J/kgK
Check my work 6 10 A piston-cylinder device contains 0.63 kg of nitrogen gas at 140...
Check my work 6 10 A piston-cylinder device contains 0.63 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 cy" 0.743 kJ/kg.K. (Round the final...
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 0.63 kg of nitrogen gas at 140 kPa and 37°C. The gas...
A piston-cylinder device contains 0.63 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-halt. 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 C -0.743 kJ/kg K. (Round the final answer to five decimal places.) The...
value: 20.00 points 1 out of 3 attempts A piston-cylinder device contains 609 grams of R134a...
value: 20.00 points 1 out of 3 attempts A piston-cylinder device contains 609 grams of R134a at 60 kPa and-20°C. The R134a is heated until its temperature reaches 100°C. Determine the total change of volume. Assistance Check My Work View Hint View Question Print Question Help Report a Problem
(6). (12 points) A piston-cylinder device contains 0.25 kg of air initially at 1.8 MPa and...
(6). (12 points) A piston-cylinder device contains 0.25 kg of
air initially at 1.8 MPa and 360 °C. The air is first expanded
isothermally to 400 kPa, then compressed polytropically, with a
polytropic exponent of 1.2 to the initial pressure, and finally
compressed at the constant pressure to the initial state. Pease
find: (a) (3p) The boundary work for the isothermal expansion
process. (b) (3p) The boundary work for the polytropic compression
process. (c) (3p)The boundary work for the constant...
1. Question 4-7 from Thermodynamics ed. 7: A piston- cylinder device initially contains 0.07 m' of...
1. Question 4-7 from Thermodynamics ed. 7: A piston- cylinder device initially contains 0.07 m' of nitrogen gas at 130 kPa and 180 C. The nitrogen is now expanded to a pressure of 80 kPa polytropically with a polytropic exponent whose value is equal to the specific heat ratio (called isentropic expansion). Determine the final temperature and the boundary work done during this process.
can someone help me with this problem? Help S. You received no credit for this question...
can
someone help me with this problem?
Help S. You received no credit for this question in the previous attempt. View of 3 Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part A piston-cylinder device initially contains 15 13 of helium gas at 25 psia and 70°F. Helium is now compressed in a polytropic process (PV- constant) to 70 psia and 300' Use data from tables. Determine...
A piston–cylinder device contains 2 kg of air initially at 90 kPa and 30°C. The air is now compressed slowly in a process during which PV k = constant until the volume is reduced by one-half. If the exponent k characterizing the compression process is the
A piston–cylinder device contains 2 kg of air initially at 90 kPa and 30°C. The air is now compressed slowly in a process during which PV k = constant until the volume is reduced by one-half. If the exponent k characterizing the compression process is the specific heat ratio of the air for the average operating temperatures (Table A-2b), the net heat transfer for the process is expected to be zero (adiabatic). Determine the work done and show that the...
A piston-cylinder device contains 1.15 kg of air initially at 2441 kPa and 379 oC. The...
A piston-cylinder device contains 1.15 kg of air initially at 2441 kPa and 379 oC. The air is first expanded isothermally to 470 kPa, then compressed polytropically with a polytropic exponent of 1.7 to the initial pressure, and finally compressed at the constant pressure to the initial state. Determine the net work of the cycle Net work kJ A pistoo-cylinder deuice contains 0.45 kg ofair ity at 2°us kPa and 318 c. The air is first expanded iiethermally to 465kfe,...
(20 points) A piston cylinder device contains 3kg of nitrogen initially at 250k Pa and 50C. The nitrogen is now compressed slowly in a polytropic process during which PV1.3= constant until the volume is reduced by one half. Determine the work done and the heat transfer for this process. Use R=0.298kJ/kgK and c = 0.744k.J/kgK
Check my work 6 10 A piston-cylinder device contains 0.63 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 cy" 0.743 kJ/kg.K. (Round the final...
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 0.63 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-halt. 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 C -0.743 kJ/kg K. (Round the final answer to five decimal places.) The...
value: 20.00 points 1 out of 3 attempts A piston-cylinder device contains 609 grams of R134a at 60 kPa and-20°C. The R134a is heated until its temperature reaches 100°C. Determine the total change of volume. Assistance Check My Work View Hint View Question Print Question Help Report a Problem
(6). (12 points) A piston-cylinder device contains 0.25 kg of
air initially at 1.8 MPa and 360 °C. The air is first expanded
isothermally to 400 kPa, then compressed polytropically, with a
polytropic exponent of 1.2 to the initial pressure, and finally
compressed at the constant pressure to the initial state. Pease
find: (a) (3p) The boundary work for the isothermal expansion
process. (b) (3p) The boundary work for the polytropic compression
process. (c) (3p)The boundary work for the constant...
1. Question 4-7 from Thermodynamics ed. 7: A piston- cylinder device initially contains 0.07 m' of nitrogen gas at 130 kPa and 180 C. The nitrogen is now expanded to a pressure of 80 kPa polytropically with a polytropic exponent whose value is equal to the specific heat ratio (called isentropic expansion). Determine the final temperature and the boundary work done during this process.
can
someone help me with this problem?
Help S. You received no credit for this question in the previous attempt. View of 3 Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part A piston-cylinder device initially contains 15 13 of helium gas at 25 psia and 70°F. Helium is now compressed in a polytropic process (PV- constant) to 70 psia and 300' Use data from tables. Determine...
A piston-cylinder device contains 1.15 kg of air initially at 2441 kPa and 379 oC. The air is first expanded isothermally to 470 kPa, then compressed polytropically with a polytropic exponent of 1.7 to the initial pressure, and finally compressed at the constant pressure to the initial state. Determine the net work of the cycle Net work kJ A pistoo-cylinder deuice contains 0.45 kg ofair ity at 2°us kPa and 318 c. The air is first expanded iiethermally to 465kfe,...
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