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Recent questions tagged polytropic processes
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What are Reversible Process ? State the conditions for Reversible process.
asked
Apr 3, 2019
in
Class 11
by
kratos
thermodynamics
class-11
polytropic processes
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vote
1
answer
A cylinder/piston contains air at ambient conditions, 100 kPa and 20°C with a volume of 0.3 m^3. The air is compressed to 800 kPa in a reversible
asked
Mar 31, 2019
in
Mathematics
by
kratos
thermodynamics
polytropic processes
+3
votes
1
answer
Saturated water vapor at 20 psia is compressed to 60 psia in a reversible adiabatic process. Find the change in v and T.
asked
Mar 16, 2019
in
Mathematics
by
kratos
bernoulli
thermodynamics
bernoulli equation
reversible processes
polytropic processes
reversible shaft work
steady state
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1
answer
A 35 ft^3 rigid tank has air at 225 psia and ambient 600 R connected by a valve to a piston cylinder. The piston of area
asked
Mar 15, 2019
in
Mathematics
by
kratos
transient processes
compressibility factor
bernoulli
thermodynamics
polytropic processes
reversible shaft work
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vote
1
answer
Water at 100 kPa, 150°C receives 75 kJ/kg in a reversible process by heat transfer. Which process changes * the most:
asked
Mar 13, 2019
in
Mathematics
by
kratos
available energy
thermodynamics
reversible processes
reversible work
polytropic processes
steady state
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votes
1
answer
Air in a rigid 1 m^3 box is at 300 K, 200 kPa. It is heated to 600 K by heat transfer from a reversible heat pump that receives energy
asked
Mar 7, 2019
in
Mathematics
by
kratos
carnot cycles
thermodynamics
reversible processes
entropy of ideal gases
available energy
reversible work
polytropic processes
steady state
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1
answer
A mass of 1 kg of air contained in a cylinder at 1.5 MPa, 1000 K, expands in a reversible isothermal process to a volume 10 times larger.
asked
Mar 5, 2019
in
Mathematics
by
kratos
entropy of ideal gases
thermodynamics
polytropic processes
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votes
1
answer
A cylinder/piston contains air at ambient conditions, 14.7 lbf/in.^2 and 70 F with a volume of 10 ft^3. The air is compressed to 100 lbf/in.^2
asked
Feb 11, 2019
in
Mathematics
by
kratos
thermodynamics
polytropic processes
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votes
1
answer
An old abandoned saltmine, 3.5 x 106 ft^3 in volume, contains air at 520 R, 14.7 lbf/in.^2. The mine is used for energy storage so the local power
asked
Jan 25, 2019
in
Mathematics
by
kratos
thermodynamics
transient processes
polytropic processes
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votes
1
answer
A mass of 2 kg ethane gas at 500 kPa, 100°C, undergoes a reversible polytropic expansion with exponent, n = 1.3, to a final temperature
asked
Jan 20, 2019
in
Mathematics
by
kratos
thermodynamics
polytropic processes
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vote
1
answer
Air in a piston/cylinder arrangement is at 110 kPa, 25°C, with a volume of 50 L. It goes through a reversible polytropic process to a final state
asked
Jan 9, 2019
in
Mathematics
by
kratos
polytropic process
thermodynamics
energy equation
polytropic processes
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votes
1
answer
A piston cylinder contains argon at 20 lbf/in.^2, 60 F, and the volume is 4 ft^3. The gas is compressed in a polytropic process
asked
Dec 28, 2018
in
Mathematics
by
kratos
thermodynamics
ideal gas
polytropic processes
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votes
1
answer
A work of 2.5 kJ must be delivered on a rod from a pneumatic piston/cylinder where the air pressure is limited to 500 kPa.
asked
Dec 20, 2018
in
Mathematics
by
kratos
thermodynamics
polytropic processes
boundary work
energy equation
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votes
1
answer
A mass of 1 kg of air contained in a cylinder at 1.5 MPa, 1000 K, expands in a reversible adiabatic process to 100 kPa.
asked
Dec 19, 2018
in
Mathematics
by
kratos
entropy of ideal gases
thermodynamics
polytropic processes
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votes
1
answer
In a certain process, 400 J of heat is added to a system and the system simultaneously does 100 J of work.
asked
Dec 19, 2018
in
Chemistry
by
kratos
irodov
cbse
class-11
jee
physical chemistry
thermodynamics
heat capacity
jee mains
polytropic processes
class-12
+2
votes
1
answer
An electric dip heater is put into a cup of water and heats it from 20°C to 80°C. Show the energy flow(*) and storage and explain
asked
Dec 1, 2018
in
Mathematics
by
kratos
entropy generation
heat exchangers
continuity equation
thermodynamics
bernoulli equation
polytropic processes
reversible shaft work
flow rates
+2
votes
1
answer
Helium gas expands from 125 kPa, 350 K and 0.25 m^3 to 100 kPa in a polytropic process with n = 1.667. Is the work positive,
asked
Nov 27, 2018
in
Mathematics
by
kratos
polytropic process
energy equation
ideal gas
thermodynamics
polytropic processes
+2
votes
1
answer
A cylinder containing R-134a at 60 F, 30 lbf/in.^2, has an initial volume of 1 ft ^3. A piston compresses the R-134a in a reversible, isothermal
asked
Nov 15, 2018
in
Mathematics
by
kratos
entropy generation
thermodynamics
ideal gas
polytropic processes
+1
vote
1
answer
A cylinder/piston contains saturated vapor R-22 at 10°C; the volume is 10 L. The R-22 is compressed to 2 MPa, 60°C in a reversible
asked
Nov 5, 2018
in
Mathematics
by
kratos
thermodynamics
polytropic processes
+3
votes
1
answer
A cylinder/piston contains carbon dioxide at 1 MPa, 300°C with a volume of 200 L. The total external force acting on the piston
asked
Oct 25, 2018
in
Mathematics
by
kratos
thermodynamics
polytropic processes
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