Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with reversibility
Search options answers only
not deleted
user 247642
The potential for a thermodynamic process to be reversed in time. Alternatively, a quantification of how far an irreversible process is from being reversible, which relies on a comparison to a corresponding theoretical reversible process.
0
votes
Why is a continuum of bath modes required for irreversible dynamics?
The situation is somewhat similar to a spreading wave packet: if it is spreading in a region bounded by two potential walls, then at some point the reflected waves come back to the point where the pac …
- 65k
5
votes
Example of an irreversible process using this formal definition
I think there are some cases that are not covered by this definition of reversibility and are, therefore, irreversible. …
- 65k
1
vote
Are there known conditions that ensure infinite slowness is reversible?
Update
I would like to take here the notch further the point brought forward in the answer by @Themis, and my own answer to my related question What maximizes entropy?
As @Themis point out, Gibbs ent …
- 65k
2
votes
Accepted
Does an irreversible thermodynamic process always increase the entropy?
Gibbs explicitly defined entropy as the quantity that always increases in irreversible processes. This was the way to formulate a coherent set of thermodynamic laws. In this sense, the thermodynamic e …
- 65k
0
votes
What's the significance of a quasi-static process?
If a system initially at equilibrium in state 1 is moved to state 2, then it will not be necessarily in equilibrium in this latter state, so one will have to wait for some time that it relaxes to equi …
- 65k
-2
votes
Why must all reactions be reversible according to thermodynamics?
In thermodynamics equilibrium is understood where all the relaxation processes that are fast in the time scale of interest have already ended, whereas the slow processes are too slow to produce notice …
- 65k
0
votes
Quasistatic and Reversible thermodynamic processes
A gas is expanded by removing the force on a piston, however due to friction this expansion happens slowly. The gas is in internal equilibrium, but the pressure inside the gas is not equal to the pre …
- 65k
1
vote
Kullback-Leibler divergence as a measure of irreversibilty?
The reverse trajectory is a trajectory obtained by reversing the direction of time, which here means simply reversing the directions of all the momenta (more precisely, reversing the directions of the …
- 65k
1
vote
Past prediction of a damped harmonic oscillator (a follow-up of a previous question)
But this is not what we call reversibility of fundamental laws, since damping here is a phenomenological force. …
- 65k
12
votes
Where does the irreversiblity came from if all the fundamental interaction are reversible?
Irreversibility comes from the thermodynamics: the probability that we return to the same state in any reasonable amount of time is extremely small. In more technical terms: the entropy is increasing. …
- 65k
8
votes
Difference between Reversible and Irreversible processes in Physics vs. Chemistry
Reversible chemical reactions are not really processes from thermodynamics point of view, i.e., it doesn't make sense to apply to them term reversibility in its physical meaning. …
- 65k
2
votes
Can heat(?) flow from a cold object to hot object?
Heat can flow from cold to hot objects, as, e.g., it takes place in refrigerators and air-conditioners, but it requires external work on the system. This work is necessarily produced by a "heat engine …
- 65k
0
votes
$dU=dQ$ and $dU=TdS$, but $dQ$ not always equal to $TdS$? Why?
Here $U(S,V) $ is a function of two variables, $S$ and $V$. $U$ is a state function, which means that, regardless of the path taken between states $S_1,V_1$ and $S_2,V_2$, the change of $U$ is the sam …
- 65k
13
votes
In the Langevin dynamics: neglecting inertia. A mathematician trying to understand physics t...
A physicist would often write these equations as
$$
m\ddot{x}=-\gamma\dot{x}+\xi(t)\Leftrightarrow
\begin{cases}\dot{x}=v,\\
m\dot{v}=-\gamma v+\xi(t)\end{cases}
$$
Admittedly, it lacks mathematical r …
- 65k