All Questions
Tagged with free-energy reduction-potential
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How does cell potential change with temperature for positive enthalpy and negative entropy?
A recent United States National Chemistry Olympiad question asked:
A certain voltaic cell has a standard cell potential that increases with increasing temperature. Which best explains this ...
- 206
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How to use anodic and cathodic overpotentials to calculate electrolytic energy efficiency?
I am trying to calculate the energy efficiency for $\ce{CO2}$ reduction to formate, coupled to water oxidation based on literature data.
$$\ce{CO2 + 2e- + 2H+ -> HCOOH}$$
$$\ce{H2O -> 2H+ + 1/...
- 337
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Proof of the chemical potential formula
My textbook as well as Wikipedia both state the formula $\mu_A = \mu_A^0 + RT\ln\{A\}$ which gives the chemical potential $\mu_A$ of a chemical species $A$ as function of the standard chemical ...
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Why exactly are standard potentials additive?
I don't really study chemistry so while my question may be very obvious, its not obvious to me. If we take an electrochemical reaction like
$$\ce{2Fe^2+ + Au^3+ -> 2Fe^3+ + Au+}$$
we can find its ...
- 813
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Derivation of relationship between Gibbs free energy and electrochemical cell potential
Why is $\Delta G = -nFE$?
I don't understand what the motivation is behind this definition. Was it derived or just given? The textbook provides no justification for this equation. In fact, much of ...
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