All Questions
Tagged with equilibrium phase
39
questions
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Do we group reversible reaction with all reactants and product solid as homogenous or heterogeneous equilibrium?
My personal thought is that they should be in heterogenous equilibrium as we define it as all reactants and products being of different phase (phase-their must not be a visible boundary) and solids ...
- 1
6
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163
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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 ...
- 782
1
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3
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985
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Why does equilibrium of ice and water only exist at 273K at normal pressure?
I am a high school student and I am a little confused in the concept of spontaneity of a reaction and how equilibrium works for a reaction, I got some confusions:
Let's take example of freezing of ...
- 252
2
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209
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Interpreting Ternary Phase Diagram Stoichiometry
I am trying to locate the lowest-melting mixture in a system of three nitrate salts: sodium, potassium, and calcium nitrate. I have the relevant ternary phase diagram, but I am unsure exactly about ...
- 782
2
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2
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227
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Phase equilibrium & phase diagram [closed]
Q) Why does phase equilibrium/inter-conversion ONLY occur at boundary lines between phases in phase diagrams?
Example: According to water phase diagram, at 200 C and 200 atm ONLY liquid water ...
- 129
3
votes
3
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575
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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
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 ...
- 29
1
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2
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382
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Triple Point of a compound and critical point
Is it necessary for all compounds to have a triple point? Also, how is the triple point determined?
Suppose a substance does not have a triple point, so how do researchers agree on the impossibility ...
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172
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Understanding Pourbaix diagram
I am recently taking courses in environmental chemistry and I was introduced to Pourbaix diagram. I was taught that the lines in the Pourbaix diagrams are equilibrium lines. Lets take as an example ...
- 766
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1
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129
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Equilibrium for the synthesis of methanol
Liquid methanol is obtained with carbon monoxide gas and hydrogen gas in a reactor at $\pu{300 °C}$ and $\pu{250 atm}.$ $K_p = \pu{9.28E-3}.$ Find $K_c.$
With only these data, do I have to use the ...
- 201
2
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32
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Working out energies of hydrogen bonds by comparing chemical potential of vapour and condensed phase - equation derivation
I want to ask a question about working out the energy of a hydrogen bond between two water molecules, $w_{AA}$ using the chemical potentials of vapour and condensed phases.
I was reading K. Dill, ...
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3
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318
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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=\...
- 2,080
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. ...
- 40.9k
2
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3
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1k
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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?
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6
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215
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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 $\mu_i^{vap} = \mu_i^{liq}$. ...
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