(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 pressure
process. (d) (3p) The net work of the cycle.
Homework Answers
Add Answer to:
(6). (12 points) A piston-cylinder device contains 0.25 kg of
air initially at 1.8 MPa and...
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,...
Air in a cylinder-Piston device undergoes a cyclic process. Initially, the air is at P-5 [MPa)...
Air in a cylinder-Piston device undergoes a cyclic process. Initially, the air is at P-5 [MPa) and T-350 [C]. Process 1 to 2 is an isothermal expansion from 5 (MPa) to 1 [MPa). Process 2 to 3 is a polytropie compression to 5 [MPa) with a polytropic exponent n=1.3. The cycle gets completed by a constant pressure process from the state 3 to 1. Air properties are R 0.287 [Kj/Kg. K] and k=1.4 and the mass of air in cylinder...
Problem 7-173- A piston–cylinder device contains air that undergoes a reversible thermodynamic cycle. Initially, air is...
Problem 7-173- A piston–cylinder device contains air that undergoes a reversible thermodynamic cycle. Initially, air is at 400 kPa and 300 K with a volume of 0.3 m3. Air is first expanded isothermally to 150 kPa, then compressed adiabatically to the initial pressure, and finally compressed at the constant pressure to the initial state. Accounting for the variation of specific heats with temperature, determine the work and heat transfer for each process.
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.
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]
a piston -cylinder device contains 2.5 Kg of carbon dioxide (CO2 ) initially at 100 KPa...
a piston -cylinder device contains 2.5 Kg of carbon dioxide (CO2 ) initially at 100 KPa and 300o C. The carbon dioxide is then compressed to 200 kPa following a process of Pv1.25 =constant. Determine (A) the boundary worked needed for the process (B) The temperature after compression . use Ideal gas state and Pressure in absolute pressure ; R=0.1889 KJ/Kg-K
Piston Cylinder device contains a 0.32 m3 of air at an initial condition of 300 KPa,...
Piston Cylinder device contains a 0.32 m3 of air at an initial condition of 300 KPa, 500 K and is compressed isothermally to a final pressure of 700 kPa. For air, R= 287 J/Kg.K 1. Determine the work done during the process. 2. Determine if the work is done on the system or done by the system. 3. Plot the PV diagram showing all the states and numbers on it.
Piston Cylinder device contains a 0.32 m3 of air at an initial condition of 300 kPa,...
Piston Cylinder device contains a 0.32 m3 of air at an initial condition of 300 kPa, 500 K and is compressed isothermally to a final pressure of 700 kPa. For air, R= 287 J/Kg.K 1. Determine the work done during the process. 2. Determine if the work is done on the system or done by the system. 3. Plot the PV diagram showing all the states and numbers on it.
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...
Piston Cylinder device contains a 0.32 m3 of air at an initial condition of 300 kPa,...
Piston Cylinder device contains a 0.32 m3 of air at an initial condition of 300 kPa, 500 K and is compressed isothermally to a final pressure of 700 kPa. For air, R=287 J/Kg.K 1. Determine the work done during the process. 12% 2. Determine if the work is done on the system or done by the system. 4% 3. Plot the PV diagram showing all the states and numbers on it. 4% oras
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,...
Air in a cylinder-Piston device undergoes a cyclic process. Initially, the air is at P-5 [MPa) and T-350 [C]. Process 1 to 2 is an isothermal expansion from 5 (MPa) to 1 [MPa). Process 2 to 3 is a polytropie compression to 5 [MPa) with a polytropic exponent n=1.3. The cycle gets completed by a constant pressure process from the state 3 to 1. Air properties are R 0.287 [Kj/Kg. K] and k=1.4 and the mass of air in cylinder...
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.
Piston Cylinder device contains a 0.32 m3 of air at an initial condition of 300 kPa, 500 K and is compressed isothermally to a final pressure of 700 kPa. For air, R= 287 J/Kg.K 1. Determine the work done during the process. 2. Determine if the work is done on the system or done by the system. 3. Plot the PV diagram showing all the states and numbers on it.
Piston Cylinder device contains a 0.32 m3 of air at an initial condition of 300 kPa, 500 K and is compressed isothermally to a final pressure of 700 kPa. For air, R=287 J/Kg.K 1. Determine the work done during the process. 12% 2. Determine if the work is done on the system or done by the system. 4% 3. Plot the PV diagram showing all the states and numbers on it. 4% oras
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago