Chemistry / Chem 2165 · Atom · ~20 seconds
Cell Potential Defined
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Cell potential, Ecell, is the potential difference measured between a galvanic cell's two half-cells, since an individual half-cell's potential can only ever be assessed relative to another.
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A voltmeter connected across a cell's two electrodes reads that cell's potential directly, in volts.
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A single electrode has no potential in isolation — every measured value is already a difference between two half-cells.