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Questions tagged [chemical-potential]

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Do "pseudo Van der Waals" gases exist?

In college, when deriving the Langmuir isotherm for gas-solid adsorption, the professor proposed a modified version of the Van der Waals state equation, what he called the "pseudo Van der Waals ...
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Meaning of chemical potential in chemical reactions

In my thermodynamics course, we introduced the chemical potential as a modification of the first + second law of thermodynamics in the case of a system that can exchange particles with its ...
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Practical meaning of omega potential

In statistical thermodynamics, the quantity omega potential is defined and is different for fermions, photons, phonons and other particles . I have been understanding the derivations of omega ...
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Why does the equation for chemical potential apply to liquids and aqueous solutes?

The equation for chemical potential of a gas can be derived as such: At constant temperature, $$\mathrm dG = V\,\mathrm dP \label{eqn:1}\tag{1}$$ Substituting with the ideal gas law $PV = nRT$, $$\...
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Henry's Law vs Raoult's Law Standard States for Activities

I am currently reading McQuarrie and Simon's Physical Chemistry and don't fully understand their discussion of standard states for activities. On page 990 they write (with a few minor adjustments to ...
Neel's user avatar
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What solvents can I use to dissolve Epichlorohydrin rubber and Chloroprene Rubber

I am working with Epichlorohydrin and Chloroprene Rubbers and I would like to cast films of 2 mm at most. The solvents I have in my lab are DMSO, THF, DMF, Acetone, Ethanol and Propylene Carbonate. ...
Arjun Satheesh's user avatar
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Can chemical potential be directly measured like this?

I have a system of a pure ideal gas $a$, which I call 'the reference', with a known $P^{ref}, V^{ref}, T^{ref}$ and $n^{ref}_a$. I know the chemical potential formula for an ideal gas, so can ...
Juan Perez's user avatar
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Do helium and neon form "stable" chemical compounds?

Helium and neon are the two most unreactive elements in the Periodic Table, but could they form compounds with an element such as fluorine that won't spontaneously explode and decompose outside of ...
Bruh Moments's user avatar
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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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Simple Calculation of Potentials for a hydrogen-oxygen Fuel cell, unexpected results from book example

I am reading "Alternative energy systems" by Hodge. On the fuel cell section, the author has an example for calculating the potential required for the fuel cell as a function of temperature ...
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What is the necessary and sufficient condition for a mixture to be ideal?

I am trying to understand some concepts from solution thermodynamics related to ideal mixtures and fugacity. My main question is what is the necessary and sufficient condition for a mixture to be an ...
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Integration of chemical potential

I want to ask a question about chemical potential, $\mu$. I dislike the use of integrals to describe quantities in thermodynamics. If we observe the definition of chemical potential for constant ...
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Dependence of Chemical Potential in Derivation of Clapeyron Equation

The "standard" derivation of the Clapeyron equation begins with considering two phases $\alpha$ and $\beta$ that are in equilibrium. The claim made is that $$\mu^\alpha(T,P) = \mu^\beta(T,P)$...
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Chemical potentials of mixture of two kinds of ideal gases vs. ideal gas separated by partition

Consider the below physical situations: (i) Closed rigid container of volume $V$ that is isolated from the rest of the universe with uniform temperature $T$ and pressure $P$ filled and mixed with two ...
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How Sodium Nitrite Interacts with Air and Humidity

What happens to integrity of sodium nitrite (NaNo², CAS: 7632-00-0) of AR grade when it gets exposed to air? If container has been opened and chemical has been exposed to air for a few minutes and ...
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