Question

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]

Science   Advanced-Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In a cylinder/piston arrangement, air is compressed in a reversible polytropic process to a final state...
In a cylinder/piston arrangement, air is compressed in a reversible polytropic process to a final state of 800 kPa, 500 K. Initially air is at 110 kPa and 25oC. During the compression process heat transfer takes place with the ambient maintained at 25oC. Assume air as an ideal gas (R =0.287 kJ/kg) and has constant specific heats of Cp = 1.004 kJ/kgK and Cv = 0.717 kJ/kgK. If the mass of air in the cylinder is 0.1286 kg, determine a)...
A piston cylinder device contains 0.15 kg of air initially at 2 MPa and 350 C....
A piston cylinder device contains 0.15 kg of air initially at 2 MPa and 350 C. First, the air expands isothermally to a pressure of 500 kPa. Then, it is compressed polytropically back to the initial pressure (2 MPa) with a polytropic exponent of 1.2. Find the work performed or introduced by or to the air for each process. Express it both times in kJ.
The volume of 0.850 kg of argon (MW = 40) in a closed piston-cylinder device is...
The volume of 0.850 kg of argon (MW = 40) in a closed piston-cylinder device is initially 0.500 m3. Now the gas is expanded at a constant pressure of 165.0 kPa to a volume of 1.30 m3. Note: The IUPAC sign convention for work is used. Work into the system has a positive value. What is the moving boundary work? kJ What is the heat interaction? Assume Cp(T)= 21 kJ/kmol·K. kJ
A 0.2 m3 piston-cylinder initially contains 400 K air. A heavy frictionless piston maintains a pressure...
A 0.2 m3 piston-cylinder initially contains 400 K air. A heavy frictionless piston maintains a pressure of 500 kPa abs. Then, a weakness in the cylinder wall blows out and creates a hole. Air escapes through the hole until the piston drops far enough to cover the hole. At that point, the volume is half the initial volume. During this process, 75 kJ of heat is transferred to the 100 kPa, 300 K surroundings. Using Cp = 1.005 kJ/kg-K and...
A 0.2 m3 piston/cylinder contains air at 400 K and 400 kPa and receives heat from...
A 0.2 m3 piston/cylinder contains air at 400 K and 400 kPa and receives heat from a constant temperature heat source at 1300 K.   The piston expands at constant pressure to a volume of 0.6 m3. Determine the change of availability of the system.
A piston-cylinder device contains 3.2 kg of air at 400 kPa and 10°C. Heat is transfered...
A piston-cylinder device contains 3.2 kg of air at 400 kPa and 10°C. Heat is transfered to air and the piston is allowed to expand at constant pressure until its temperature reaches 50°C. The work done during this expansion process is: Use kj units
A piston - cylinder device, whose piston is resting on a set of stops, initially contains...
A piston - cylinder device, whose piston is resting on a set of stops, initially contains 2 kg of air at 300 kPa and 27 degree C. The mass of the piston is such that a pressure of 600 kPa is required to move it. Heat is now transferred to the air until its volume doubles. a) Show the process on p - V and p - T diagrams. b) Determine the work done by the air. c) Determine the...
A cylinder with a moveable piston holds 1.20 mol of argon at a constant temperature of...
A cylinder with a moveable piston holds 1.20 mol of argon at a constant temperature of 295 K. As the gas is compressed isothermally, its pressure increases from 101 kPa to 145 kPa. (a) Find the final volume of the gas. (answer in: m3) (b) Find the work done by the gas. (answer in: kJ) (c) Find the heat added to the gas. (.. kJ)
A piston cylinder device contains a mixture of 0.2 kg of H2 and 1.6 kg of...
A piston cylinder device contains a mixture of 0.2 kg of H2 and 1.6 kg of N2 at 100 kPa and 300K. Heat is now transferred to the mixture at constant pressure unitl the volume is doubled. Assuming constant specific heats at the average temperature (the constant pressure specific heats of H2 and N2 are 14.501 kJ/kg°K and 1.049 kJ/kg°K, respectively), determine: a) the heat transfer. b) the entropy change of the mixture.
A piston cylinder device contains 5 kg of Refrigerant 134a at 800 kPa and 70 C....
A piston cylinder device contains 5 kg of Refrigerant 134a at 800 kPa and 70 C. The refrigerant is now cooled at constant pressure until it reaches a saturated vapor state. How much heat was lost in the process? Express your result in kJ and you may ignore the negative sign.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT