Gibbs Free Energy and Thermodynamic Relationships
Relate cell potential to Gibbs free energy, equilibrium constant, and other thermodynamic quantities in electrochemical systems.
Why this shows up in the exam
You must connect electrochemical cell data to thermodynamic concepts like spontaneity and equilibrium in exams.
How NEET tests this
Practise it
These are real questions from past NEET papers that test this exact idea.
For a cell involving one electron, E°cell = 0.59 V at 298 K, the equilibrium constant for the cell reaction is [Given that 2.303RT/F = 0.059 V at T = 298 K]
Push further
More challenging6 harder questions built from the past papers above — a step up in difficulty, with distractors designed so you can't get there by elimination. Written and checked by our reviewers, not from a real paper.
An electrochemical cell has a standard cell potential (E°cell) of +0.60 V. If the reaction involves the transfer of 4 electrons, and the standard Gibbs free energy change (ΔG°) is -231.6 kJ mol⁻¹, what is the value of the Faraday constant (F) used in this calculation? Assume the temperature is 298 K.
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