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Topic: Electrochemistry  (Read 2355 times)

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Offline vernii

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Electrochemistry
« on: January 19, 2023, 06:28:08 AM »
Why does the voltage decreases as the electrochemical cell works and the concentration of ions begins to change both the sides ?
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Offline Hunter2

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Re: Electrochemistry
« Reply #1 on: January 19, 2023, 09:39:20 AM »
Do you know the Nernst equation for chemical cell?
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Offline vernii

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Re: Electrochemistry
« Reply #2 on: January 21, 2023, 04:36:52 AM »
I know the answer based on the equation but what is the basis of the equation ?
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Offline Borek

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Re: Electrochemistry
« Reply #3 on: January 21, 2023, 05:38:26 PM »
Thermodynamics. System tries to go the equilibrium which is the least energy state. As long as there is potential difference there is an energy available. If you try to use thermodynamics to mathematically describe the Gibbs energy of the redox system you get the Nernst equation.
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