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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 …
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 …
-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 …
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 …
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. …
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, $\vec{f}_{chemical}$ …
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. …
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 …
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. …
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. …
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. …
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 …
-1
votes
2
answers
71
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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 …
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, …
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, …