Air is trapped in a piston cylinder arrangement. The air expands from a temperature of 60...
Air is trapped in a piston cylinder arrangement. The air expands from a temperature of 60 C and a pressure of 280 KPa to a pressure of 140 KPa. During the process, 30 KJ/Kg of work is done and 14 KJ/Kg of heat is removed. The initial volume is 0.00878 m^3.
a) What is the mass of the air?
b) What is the temperature change during this process?
c) What is the entropy change during this process?
d) Does the air gain or lose entropy during this process?
Homework Answers
Add Answer to:
Air is trapped in a piston cylinder arrangement. The air expands
from a temperature of 60...
5. Air expands isothermally constant temperature) in a closed, piston-cylinder device. The original state is given...
5. Air expands isothermally constant temperature) in a closed, piston-cylinder device. The original state is given by pı = 20 MPa, T = 1000 K. the process continues until the pressure drops to 2 MPa. The original volume of the air is V1 = 1 m². Determine the following: a. the mass of the air in the system, in kg. b. the final density of the air, in kg/m". Remember, Rair = 0.287 kJ/kg-K c. the final volume of the...
4 Problem 4: Piston Air expands reversibly and adiabatically in a piston-cylinder from a pressure of...
4 Problem 4: Piston Air expands reversibly and adiabatically in a piston-cylinder from a pressure of 10 MPa and a temperature of 350 C to a final pressure of 2.0 MPa. Calculate the work done in kJ/kg.
Air contained in a piston-cylinder undergoes two processes in series. In the first the air expands...
Air contained in a piston-cylinder undergoes two processes in series. In the first the air expands according top V = C from 300 kPa and a specific volume of 0.021 m 3 /kg to a pressure of 140 kPa. The second process is a constant pressure compression until specific volume 3 equals specific volume 1. Sketch the processes on a p- V diagram and determine the work per unit mass.
Please write equations clearly and table numbers Refrigerant R-134A is trapped inside a piston-cylinder assembly. The...
Please write equations clearly and table numbers
Refrigerant R-134A is trapped inside a piston-cylinder assembly. The refrigerant undergoes a compression process from a pressure of 400 kPa containing 55% saturated liquid to a final pressure of 600 kPa. During the compression process, a total of 110 KJ/kg of heat is transferred out while the boundaries of the cylinder are maintained at 100°C, which is also the temperature of the surroundings During this process the entropy generation is o.06749 kJ/kg K....
0.15 kg of air in a frictionless piston cylinder at 100 kPa and 600 K is...
0.15 kg of air in a frictionless piston cylinder at 100 kPa and 600 K is cooled to a final temperature of 25°C by heat rejection to the surroundings which are at a temperature of 25°C. (a) Show the process on a P-v diagram with lines of constant temperature, and on a T-s diagram with lines of constant pressure. (b) Determine the total work done and the total heat transfer for the process. (c) Calculate the entropy change for the...
A piston-cylinder arrangement contains Nitrogen initially at 200 kPa, 107 C and 0.30 m3. The piston...
A piston-cylinder arrangement contains Nitrogen initially at 200 kPa, 107 C and 0.30 m3. The piston moves until the pressure increases to 500 kPa. The pressure-volume relationship during the process is described by the equation: P= -2000 V + 800 where P is in kPa and V in m3 (a) Determine the mass of Nitrogen in kilograms (b) Determine the work done (boundary work) “on” or “by” the Nitrogen in kJ (state which). (c) Determine the final temperature.
Consider the piston/cylinder arrangement shown in Fig1. A frictionless piston is free to move between two...
Consider the piston/cylinder arrangement shown in Fig1. A
frictionless piston is free to move between two sets of stops. When
3 the piston rests on the lower stops, the enclosed volume is 0.5
m3. When the piston reaches the upper stops, the volume is 0.8 m .
The cylinder initially contains water at 200 kPa, 60% quality. The
mass of the piston requires 600 kPa pressure to move it against the
outside ambient pressure.
a) When heat is transferred until...
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 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 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...
5. Air expands isothermally constant temperature) in a closed, piston-cylinder device. The original state is given by pı = 20 MPa, T = 1000 K. the process continues until the pressure drops to 2 MPa. The original volume of the air is V1 = 1 m². Determine the following: a. the mass of the air in the system, in kg. b. the final density of the air, in kg/m". Remember, Rair = 0.287 kJ/kg-K c. the final volume of the...
Please write equations clearly and table numbers
Refrigerant R-134A is trapped inside a piston-cylinder assembly. The refrigerant undergoes a compression process from a pressure of 400 kPa containing 55% saturated liquid to a final pressure of 600 kPa. During the compression process, a total of 110 KJ/kg of heat is transferred out while the boundaries of the cylinder are maintained at 100°C, which is also the temperature of the surroundings During this process the entropy generation is o.06749 kJ/kg K....
0.15 kg of air in a frictionless piston cylinder at 100 kPa and 600 K is cooled to a final temperature of 25°C by heat rejection to the surroundings which are at a temperature of 25°C. (a) Show the process on a P-v diagram with lines of constant temperature, and on a T-s diagram with lines of constant pressure. (b) Determine the total work done and the total heat transfer for the process. (c) Calculate the entropy change for the...
A piston-cylinder arrangement contains Nitrogen initially at 200 kPa, 107 C and 0.30 m3. The piston moves until the pressure increases to 500 kPa. The pressure-volume relationship during the process is described by the equation: P= -2000 V + 800 where P is in kPa and V in m3 (a) Determine the mass of Nitrogen in kilograms (b) Determine the work done (boundary work) “on” or “by” the Nitrogen in kJ (state which). (c) Determine the final temperature.
Consider the piston/cylinder arrangement shown in Fig1. A
frictionless piston is free to move between two sets of stops. When
3 the piston rests on the lower stops, the enclosed volume is 0.5
m3. When the piston reaches the upper stops, the volume is 0.8 m .
The cylinder initially contains water at 200 kPa, 60% quality. The
mass of the piston requires 600 kPa pressure to move it against the
outside ambient pressure.
a) When heat is transferred until...
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...
Most questions answered within 3 hours.
-
Let M = 8.00kg, m = 6.00kg, θ = 40.00, and the coefficient of
kinetic friction...
asked 1 minute from now -
Java. For C through H True or false?
c. Primitive variables must be objects.
d. Integer...
asked 3 minutes ago -
Write a program that turns a 32-bit numeric value (e.g.,
0xFFFFh) and converts it to a...
asked 5 minutes ago -
A motor produces a torque of 0.25 N m at an angular velocity of
7200 revolutions...
asked 19 minutes ago -
***Please answer the below java question***
Are static methods inheritable? Can they be overridden?
asked 21 minutes ago -
In reaching her destination, a backpacker walks with an average
velocity of 1.13 m/s, due west....
asked 21 minutes ago -
Write two C programs that run a
server program and a client program concurrently.
Server program:...
asked 20 minutes ago -
Executive Program Practical Connection Assignment
Subject : Operations Security.
Assignment:
Provide a reflection of at least...
asked 30 minutes ago -
Every time Casey is at bat he has a 0.4 probability of
getting on base (assume...
asked 39 minutes ago -
The Walston Company is to be liquidated and has the following
liabilities:
Income taxes
$
9,400...
asked 46 minutes ago -
If
the more comprehensive data is available in MEPS, why does the NHIS
still exist? How...
asked 1 hour ago -
Koo argues that the Japanese economy in the 1990s suffered from
a balance sheet recession. What...
asked 1 hour ago