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For Educators · Nernst Equation

Nernst Equation for a phase change

Built for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs. Simulate a phase change live below — adjust the inputs and watch it respond, right in your browser.

Nernst Equation / Galvanic CellLive

voltage from concentration

Controls

Presets

Standard EMF E° (V)

Electrons transferred n

Reaction quotient Q

Temperature (K)

A battery's voltage depends on concentrations, not just chemistry. The Nernst equation E = E° − (RT/nF)·lnQ shows the cell voltage sliding as reactants are consumed — and reaching zero when the reaction hits equilibrium. Educational tool.

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Data Inspector

Cell voltage E1.100 V

Thermal term RT/nF0.0128 V

Spontaneous?yes (E > 0)

Governing equation

E = E^{\circ} - \frac{R T}{n F} ln Q = 1.1 - \frac{( 8.314 ) ( 298 )}{( 2 ) ( 96485 )} ln (1) = 1.100 V

Reading this result: At Q ≈ 1 the log term nearly vanishes, so the cell sits close to its standard EMF of 1.10 V.

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Frequently asked questions

Is this good for educators?: Yes — this version of "Nernst Equation for a phase change" is framed for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.