All Questions
Tagged with equilibrium phase
39
questions
7
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1
answer
1k
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How to find and use the Clausius-Clapeyron equation
I know how to get the equation from the Clapeyron equation but I have a question regarding a the integration along a phase boundary and a small step in the derivation that I will make clear when I ...
- 9,802
7
votes
3
answers
470
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Clausius–Clapeyron relation for states of water and vapor
I've seen many questions about this topic on this site, but I still have some issues trying to understand this aspect. Here's what I believe I understood
looking at the phase diagram for a pure ...
- 81
6
votes
1
answer
216
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Cases when Raoult's law is unsolvable
Setup
Consider a closed binary mixture of known total molar composition $n_i$, held at volume $V$ and temperature $T$. The equilibrium phase composition is determined by $\mu_i^{vap} = \mu_i^{liq}$. ...
- 261
6
votes
0
answers
171
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Which xylenes, if any, are immiscible with DMSO?
"Xylene" is reported to be immiscible with dimethyl sulfoxide (DMSO), according to a few solvent miscibility tables found online (chart 1, chart 2, chart 3). I have tried to locate some ...
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5
votes
1
answer
2k
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Is liquid water in equilibrium with water vapor at room temperature?
This question was inspired by Why does liquid water form when we exhale on a mirror?.
This question is different from Why does water evaporate at room temperature? because it asks about whether an ...
- 41.2k
5
votes
1
answer
643
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Is it possible to have only liquid in a closed container?
I recently read an answer by Aman Rusia for this question: Is a liquid in a container always in equilibrium with its vapour?
In it, they say that
You can't have a container filled with only ...
- 2,109
4
votes
2
answers
15k
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Why is carbon dioxide gas used in soda?
Why is carbon dioxide used in soda? What makes it preferable to other gases for this purpose?
- 41
4
votes
1
answer
2k
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How is a phase equilibrium defined for a one-component system?
A question on this site asked whether a one-component system is at equilibrium when melting or boiling, and the disparate answers were somewhat dependent on the definition of phase equilibrium. ...
- 41.2k
4
votes
1
answer
108
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'Chemical' First-order Phase Change
First order phase changes occur when one local minima of the Gibbs Free Energy becomes deeper than another. Thus at 1 atm and 99 °C, the Gibbs Free Energy of liquid water is less than the Gibbs Free ...
- 537
3
votes
3
answers
578
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What does the state of a substance at a specific T and P mean?
From the phase diagram of water, we see that water is a liquid at 20 °C, 1 atm. The state of the water at 20 °C, 1 atm is liquid. But there is actually also water vapor in equilibrium with liquid ...
- 169
3
votes
1
answer
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For homogeneous equilibrium, why are liquids and solids included in the equilibrium constant (when they aren't in heterogeneous equilibria)?
In a heterogeneous reaction (where the states are varied) we do not include liquids and solids in the equilibrium equation because their concentrations do not change.
E.g. Chemguide.co.uk
However, ...
- 2,853
3
votes
3
answers
3k
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Proof of Dynamic Nature of Equilibrium
Here is how my textbook proves that dissolution of solid in liquid is dynamic in nature. It considers the example of a saturated solution of sugar. It says that,
Though the solution is in ...
- 31
3
votes
0
answers
319
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Is the active mass of every solid and liquid taken to be unity?
I learnt from my textbook and the question/answer - Why is active mass of a pure solid or liquid always taken as unity? that active mass of a solid or liquid is taken to be unity as:
$$[A]=\frac n V=\...
- 2,090
2
votes
3
answers
1k
views
melting and boiling ...really equilibrium? [closed]
Why are melting and boiling considered equilibrium processes even though the amount (concentration) of both phases keep changing i.e from solid to liquid and so on?
- 47
2
votes
2
answers
87
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Is ionisation an equilibrium process?
I read in a page that ionisation is an irreversible process. But, as equilibrium is always reversible would that mean equilibrium does not involve ionisation process.
And than dissociation is a ...
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