All Questions
13
questions
1
vote
3
answers
994
views
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
votes
2
answers
87
views
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
vote
2
answers
386
views
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 ...
- 682
0
votes
1
answer
130
views
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
votes
0
answers
32
views
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, ...
- 1,230
4
votes
1
answer
2k
views
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
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
1
vote
2
answers
2k
views
Why are temperature and pressure represented as the number 2 in Gibbs' Phase Rule?
In our class we are learning about Gibbs' Phase Rule; $F=C-P+2$, in which $F$ stands for degree of freedom, $C$ for number of components, and $P$ for number of phases in the system. Our professor told ...
- 19
7
votes
3
answers
470
views
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
1
vote
0
answers
221
views
Anhydrous ammonia vapor-liquid equilibrium
I have been given a anhydrous ammonia vapor liquid system in an air-tight container where the pressure is 30 bar and the temperature is 30 degrees. They claim the system is in equilibrium, which I ...
- 119
2
votes
0
answers
670
views
How to measure chemical potential
I wonder if there is a way to measure the chemical potential of a substance in a two-component mixture and also to account for its dependence on the number of moles. Explaining it further, suppose ...
- 21
1
vote
1
answer
6k
views
3 component (ternary) system in equilibrium
If the components of a system were Cl2, Br2, and I2, how could I describe this system under equilibrium conditions when the number of phases is at a maximum?
If there are 3 components, using the ...
- 19
7
votes
1
answer
1k
views
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