JEE Chemistry · Medium

Electrochemistry: ΔG and EMF MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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ΔG and EMFMediumQuestion 710008

Question

The relationship between ΔG° and E°cell is:
  1. A
    ΔG° = −nFE°cell
    Correct
  2. B
    ΔG° = nFE°cell
  3. C
    ΔG° = −RTlnK
  4. D
    ΔG° = −E°cell/nF

Correct answer

ΔG° = −nFE°cell

Explanation

ΔG° = −nFE°cell, where n = moles of electrons transferred, F = Faraday constant (96485 C/mol). Combining with ΔG° = −RTlnK gives E°cell = (RT/nF)lnK.