All Questions
21
questions
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2
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921
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Why is an adiabat steeper than an isotherm in a $p$-$V$ curve?
What I have so far gathered is a mathematical explanation.
Since for an adiabatic process, $pV^γ=$ constant, for a unit change in pressure, change in volume would be very less. Therefore, if compared ...
- 133
1
vote
2
answers
152
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Adiabatic free expansion into vacuum
Consider an adiabatic vessel with a partition and a plug in the partition wall. On one side of the partition, there is gas at certain pressure and on the other side of partition there is perfect ...
- 11
3
votes
2
answers
3k
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Behavior of air in a submersible implosion
I hope that this community could help to clarify some unproven but widespread claims regarding the implosion of the Titan submersible.
Background: The 2023 Titan submersible incident created a wide ...
- 39
0
votes
1
answer
66
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A problem on adiabatic process [closed]
I solved this using the relation PV^gamma = constant (since it's an adiabatic process) and solved for the ratio of volumes. The answer key has, however, proceeded with delta U + delta Q = 0. The ...
0
votes
1
answer
121
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Determining the pressure after an adiabatic compression
(Please avoid explaining it with calculus)
I need to determine the pressure of air after an adiabatic compression. I have been given a low starting temperature T1 and a high final temperature T2 and ...
- 15
1
vote
2
answers
105
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Adiabatic temperature increase given work done on (ideal) gas
I'm playing around with a Euler's method simulation of an adiabatic compression/decompression process on an ideal gas.
If I have a volume of gas and I contract its volume slightly, I will be doing ...
- 11
2
votes
2
answers
404
views
Why is $c_p/c_v$ term introduced in adiabatic process?
In an adiabatic process we know there is no change in enthalpy or basically enthalpy change is zero. which means any external work done the internal energy does equal opposite work so as to keep $dH=0$...
- 23
0
votes
3
answers
659
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Why there's no work in adiabatic free expansion? [closed]
We say that because there is no external force on the system, the work done on the adiabatic free expansion is $0$(If this is wrong, correct me please). But there is a pressure and volume change in ...
- 1
1
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0
answers
23
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Carnot Cycle with adiabats crossing on $pV$ diagram [duplicate]
So my Thermodynamics teacher said that on a $pV$ diagram, you can get adiabats crossing for a Carnot cycle, even if all the possible thermodynamic states of the system can be represented on a $pV$ ...
- 11
0
votes
3
answers
353
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About an adiabatic stroke in the Carnot cycle
In one of the adiabatic stroke in the Carnot cycle, the temperature of the gas reduces from T1(to what it was initially heated) to T2(temperature of the surrounding).
How exactly does the internal ...
- 581
1
vote
1
answer
67
views
Related to the Second Law
It is impossible to cross two adiabatic curves. Could someone better justify me why? Is it something related to the Second Law?
- 395
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vote
1
answer
672
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When is total pressure not conserved in a system?
I came across a problem that involved two compartments that are separated by a movable, adiabatic wall. As the wall moves, the pressure is not conserved- rather total pressure decreases- assuming this ...
- 11
0
votes
1
answer
275
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Adiabatic flame temperature of ethanol in high pressure environment
I'm building a rocket engine and need to know the temperature of the gases inside the combustion chamber (ie the stagnation temperature).
The combustion chamber pressure is 5 atmospheres. The ...
-1
votes
1
answer
298
views
Calculate the work for moist air adiabatic expansion and compression?
( During expansion some water vapor condenses and is removed from the system. )
More details:
Initial conditions: t 25C, p 1013 mB, humidity 100%,
then expansion to ~ 450 540 mB
through the double ...
- 63
-1
votes
1
answer
71
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Name of this type of cooling system?
If you pump around air in a cyclic tube at a high speed, and one part of the tube is narrower than the rest of the tube, the air flow will have to increase in speed when it enters the narrow part in ...
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