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Results tagged with physical-chemistry
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user 243488
Study of macroscopic and microscopic phenomena in chemical systems in terms of physical laws and concepts [thermodynamics, statistical mechanics, kinetic theory, quantum mechanics...].
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Why does this reaction go from yellow to green to red in color?
In this youtube video by chemicalforce:
https://youtu.be/3cvUXW__QZ0
When he heats the lithium metal to metal fire point we see a yellow flame. When he brings the SF6 close it becomes green and when h …
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May the "reaction coordinate" in a chemical "reaction coordinate diagram" be represented by ...
Typically studying the progress(yield/conversion) as a function of time is a field known as chemical kinetics where there are basic differential equations of concentration with rrespect to time being …
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Why does the Anode and not the Cathode corode during eletrolysis of water into $H_2$ and $O_2$?
Metals tend to be oxidized, not reduced. Oxidation happens at the anode (positive charged one during electrolysis, it wants electrons), thus the cathode is protected look into cathodic protection.
Th …
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Why is carbon dioxide a non-polar molecule?
Yes it is about the partial charges on the atoms but the dipole is a vector not just the charge distribution which is positive in the center and negative on the O's but the vectors cancel
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What force creates electronegativity?
When a reaction happens the Gibbs free energy had to be negative.
$$\Delta G=-nFE=RT\ln(Q/K)=\mu\,\mathrm dN + V\,\mathrm dp+S\,\mathrm dT$$
So you can see that if the $E$ or the cell potential is lar …
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Why are(n’t) rechargeable batteries damaged by partial charging?
I have included a figure for the Cycle number as a function of Depth of discharge.
As you can see the cycle number decreases dramatically the larger the range of state of charge usage is.
The cycle …
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