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Search options title chemical* questions only not deleted
0 votes
2 answers
45 views

estimate specific heat and enthalpy based on chemical formula

Given the chemical formula of a coumpound (and possibly the arrangement of the various atoms and connections inside), are there theoretical or numerical approaches to compute the enthalpy and heat capacity …
Laurent90's user avatar
  • 109
6 votes
2 answers
439 views

What does pure liquids and pure solids mean in chemical equilibrium, why active mass of pure... [closed]

Background The professor who taught us chemical equilibrium defined active mass as: $$\mathrm{[activity~coefficient (\lambda)×[conc]~or~ [Partial~Pressure]}$$ and mentioned that, for the scope of our course …
Madara Uchiha's user avatar
-3 votes
1 answer
50 views

chemical bonding

How exactly does bonding work? For example, in CH4 orbital overlap structure, the internet shows 4 lobes with one hydrogen attached to each... does the s orbital of the carbon we consider after hybri …
squidward's user avatar
3 votes
2 answers
91 views

Do we always use the Hamiltonian operator in solving for the wavefunction of a chemical syst...

As I understand it, in order to obtain the wavefunction for a system we solve the eigenvalue equation for the Hamiltonian: $$\hat{H}\psi=E\psi$$ The wavefunction obtained contains all the information …
COMPCHEM's user avatar
2 votes
1 answer
46 views

Understanding the hydrogen chemical potential in transition-metal oxide redox

Then they stated as follows: In solution, the derivative with respect to the number of hydrogen atoms is the chemical potential of a proton $μ_\ce{H^+}$ at the reference potential ($E = \pu{0 V}$ vs. … \end{equation} In my opinion, there should be $\dfrac{\partial U}{\partial N_\ce{H}} = \mu_\ce{H}$, where $\mu_\ce{H}$ is the chemical potential of a neutral $\ce{H}$ atom. …
Izzy Tse's user avatar
0 votes
2 answers
48 views

Does the dominance of $f_{chemical}$ over $E$ explains the flow of electrons in a galvanic c...

My question is: what chemical / physical phenomena causes this flow of electrons within the cells? … Could it be that the approximation $\vec{f}_{chemical} + \vec{E}=0$ we make (i.e. no acceleration of the charge carriers inside the cells) is not quite accurate, and that instead, $\vec{f}_{chemical}$ …
niobium's user avatar
  • 267
1 vote
1 answer
120 views

How does a chemical species 'know' where the z axis is?

While studying chemical bonding, we take the z axis to be the inter nuclear axis, that is the axis along which sigma bonds form and perpendicular to which pi bonds form. …
Nothing's user avatar
  • 107
0 votes
1 answer
120 views

Can equilibrium exist at more than one values of substances (reactants/products) involved in...

Say there is a reversible reaction, A + B ⇌ AB. Let K1 be rate of forward reaction and K2 be the rate of backward reaction. When I try to solve such an equation for AB (the concentration of AB produce …
Lakshya Kumar Singh's user avatar
0 votes
2 answers
109 views

Is a chemical test of Special Relativity possible by monitoring rates of chemical reaction?

Is there is a suitable chemical reaction that could be used to test Special Relativity (via a variant of the twins "paradox"). … I'm not concerned with the physics here just finding a suitable chemical reaction and conditions that could be monitored with sufficient accuracy. …
Slarty's user avatar
  • 439
0 votes
2 answers
79 views

Relation between chemical potential and activity for a substance in a chemical reaction?

For a chemical reaction, the relation between its Gibbs free energy $\Delta G$ and reaction quotient $Q$ is: $$\Delta G=\Delta G^o+RT\ln Q \tag{1}$$ This can be derived from an analogous relation between … in this manner in terms of chemical potential. …
Scientisτ's user avatar
0 votes
2 answers
101 views

Examples of chemical reactions which are spontaneous and have a positive ΔS change, but are ... [closed]

We have learnt that the change in the Gibbs Free energy is an indicator that is used to determine whether a chemical reaction is spontaneous or not (at constant temperature and pressure), through the formula … I would like examples of thermodynamically spontaneous chemical reactions and are endothermic. …
LordOfMordor's user avatar
0 votes
2 answers
52 views

Functional groups in chemical formulas [duplicate]

I have a question about writing chemical formulas of compounds featuring functional groups. … This might be simple but I haven't got answer yet. my question is when we want to write chemical formula for these kind of compounds, should we write functional groups separately (for example in alcohols …
AmirHossein's user avatar
-1 votes
2 answers
71 views

Concentration and Chemical reaction

When two reactants partially react, and we are asked about concentration of one reactant, should we consider the volume of reactants, or if the products? Here's an question to make it clear. How much …
Omkar Deshmukh's user avatar
0 votes
1 answer
54 views

Proceeding of chemical reaction and stoichiometry

Suppose two reactants react to form more than one product depending upon the quantities taken. So I assumed that one of the reactant will become limiting reagent, another reactant remains unreacted, …
Omkar Deshmukh's user avatar
0 votes
2 answers
151 views

How to derive the chemical potential of an ideal solution of a non-volatile solute?

$ΔG=-nFe$ (example) and $μ = μ° + RT\ln a$ are used very frequently in chemical thermodynamics. … The chemical potential μ is expressed as a function of the standard chemical potential μ° and the activity a as follows: $μ = μ° + RT \ln a$ However, in the case of non-volatile solvents such as NaCl, …
Blue Various's user avatar

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