Question

Cool! Electra has mastered Equilibrium constants and has moved on to Gibb's energy.

Electra was thinking, "When we calculate the Gibb's energy for a SHE using electrode potential, we get 0.

So is it right to say that this half-cell ‘has no change in Gibb's energy’ ?"

What will you tell her?

Electra was thinking, "When we calculate the Gibb's energy for a SHE using electrode potential, we get 0.

So is it right to say that this half-cell ‘has no change in Gibb's energy’ ?"

What will you tell her?

Open in App

Solution

The correct option is **D** No way, that's wrong

Do you remember that we have assigned an electrode potential of 0 just for convenience? This has been done so that we can calculate the electrode potential of other elements relative to this base quantity.

But this does not mean that the absolute value of electrode potential is 0 for the hydrogen electrode. Since ΔG∘=−nFE∘, ΔG would also not be 0.

Do you remember that we have assigned an electrode potential of 0 just for convenience? This has been done so that we can calculate the electrode potential of other elements relative to this base quantity.

But this does not mean that the absolute value of electrode potential is 0 for the hydrogen electrode. Since ΔG∘=−nFE∘, ΔG would also not be 0.

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