Questions tagged [phase-diagram]
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246 questions
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“How can latent energy be harnessed by slowing phase transitions under pressure?”
I’ve been watching water approach its freezing point and noticed a brief “point between” liquid and solid. A small catalyst can make this moment predictable, and if the water is encapsulated under ...
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Which pressure to use in phase diagrams? [duplicate]
I was reading up on phase diagrams and this line on Wikipedia struck me. It says that:
“The pressure on a pressure-temperature diagram (such as the water phase diagram shown above) is the partial ...
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Thermodynamics: Existence of reversible surface along the boundary of reachable adiabatic states
in Gabriel Weinreich's book "fundamental thermodynamics" there is the following passage:
(see picture) is this correct? Why should the boundary be reversible?
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How do you write the formula for the Gibbs excess energy?
I would like to calculate the Gibbs energy within the framework of the associates model. For example, if we consider a phase of a ternary system for elements A, B and C, whose formula is $(A,B,C,AB,BC)...
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How is there a triple line on $p$-$V$-$T$ diagram for water, rather than a triple point?
If we consider the Gibbs phase rule
$$DoF(\text{Degree of Freedom}) = C - P + 2$$
for the case of water at its triple point:
$$C = 1\\
P = 3$$
Therefore we are left with $0$ degrees of freedom. So I ...
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How to perform Wilsonian RG for the $O(N)$ nonlinear sigma model?
I am interested in deriving the $\beta$ function and anomalous dimension $\gamma$ of the $O(N)$ nonlinear $\sigma$ model, in particular defined by the action $S = \frac{1}{2g} \int d^2 x (\partial_{\...
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Connection betweeen the pseudo gap and the $d$-wave gap
Background and motivation
I was recently trying to understand the physics behind the pseudo-gap better and came across this paragraph on the wikipedia entry:
"The gap, which should be associated ...
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Few doubts regarding the properties of steam
I was going through my university provided notes and I came across a doubt regarding the dryness fraction of steam.
The formula for dryness fraction of steam is:
$$\zeta=\frac{m_\text{gas}}{m_\text{...
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Solidification of Oxygen-Nitrogen mixtures
I am trying to understand the phase diagram published in by C.S. Barrett et al. in the Journal of Chemical Physics published in 1967. Figure 1 shows the phase diagram. What happens to the oxygen in ...
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What if I had a chunk of pressured solid that turns to gas at atmospheric pressure?
So I let's say I have this object that's room temperature and in a pressure chamber, and it's pressured so much that it's solidified despite being made of something that would be a gas at room temp.
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How to calculate thermodynamics equilibrium for many component system (more than 3 chemical elements)?
I would like someone to explain me what kind of methods/algorithms need to be used for calculating thermodynamic equilibrium (using CALPHAD approach) for many component systems, containing more than 3 ...
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Why is the specific heat capacity of water greater than that of ice? [duplicate]
My powerpoint at school says the following:
how can this make sense if the rate of temperature change is inversely proportional to the specific heat capacity, wouldn't that mean that the specific ...
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Thermodynamics, cooling curves
It is well known that temperature is a measure of the average kinetic energy of the medium particles. In the heating curve, when heat is added the average kinetic energy increases and the temperature ...
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Is there another way to reduce the many dimensions of string theory to the observed 4 dimensions?
I understand that string theory works best with many more dimensions than the 4 observed dimensions (1 time, 3 space). To reduce the visible dimensions, I always read that it could be that most of the ...
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What is the reason for the presence of phases in materials?
Why is it that the physics of the iron-carbon solid solution system supports such a variety of different microstructures each with different iron-carbon ratios?
