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Tagged with free-energy redox
8
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Change in Gibbs energy for lithium redox reaction
I was reading an electrochemistry book by Thomas F. Fuller, in this book the thermodynamic values for the lithium redox reaction at standard conditions are the following:
Reaction
$\Delta G^o$ [kJ/...
- 267
3
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1
answer
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Does this coupled reaction actually happen (decomposition of calcium carbonate)
I found the following example of a coupled reaction to drive the decomposition of calcium carbonate. I get the calculation part of it, that the changes in Gibbs energy sum to a negative amount. But ...
- 139
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3
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Why is this reaction spontaneous in standard conditions?
To study if this reaction is spontaneous I proceed in this way:
$$\ce{2H_{3}O^{+} +Fe ->H_{2} +Fe^{2+} + 2H_{2}O}$$
First I write the two semireaction:
$$reduction: \ \ \ce{2H_{3}O^{+} +2e^{-} ->...
- 193
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2
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Where does Free Energy go in a Redox Reaction?
This doubt came to my mind while answering the following question:
Why does a voltaic cell not operate unless the two separate compartments are connected by an external circuit?
The answer seems ...
3
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Why does standard reduction potential get multiplied by the change in oxidation state and not by the number of electrons transferred?
The whole basis of Frost diagrams is to have a graphical representation of the Gibbs free energy of formation ($\Delta{G}_{f}$) of different oxidation states of an element using the proportional ...
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Relationship between Yield and Applied Potentials
This question revolves around this question from Atkins' Chemical Principles 5th ed., Chapter 13, Question 13.116:
Consider the electroplating of a metal $+1$ cation from a solution of unknown ...
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6
votes
1
answer
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Pourbaix diagram – writing reactions
How would you go about writing the reaction between water and chromium metal under standard acid and base conditions?
I know you would have to look at the vertical lines at pH 0 and 14 but I don’t ...
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How to determine the value for n in the Gibbs free energy and redox potential equation?
I am having a problem with this equation for redox potentials
$$\Delta G = -nFE_\mathrm{cell}$$
In this equation I never am totally sure about what the value of $n$ should be, for example for the ...
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