The reaction taking place in grain alcohol and Oxygen in a fuel cell is given. The theoretical maximum voltage that given cell can achieve at 25 ° C for the given amount of maximum work is to be calculated. Concept introduction: Gibbs free energy is basically the maximum amount of non-expansion work done. Therefore, it is represented as, W max = Δ G ° The maximum amount of work that is done by an electrochemical cell is given as, W max = n F E ° cell The relationship between Gibbs free energy change and equilibrium constant is given by the formula, Δ G ° = − n F E ° cell To determine: The value of theoretical maximum voltage that given cell can achieve at 25 ° C .

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Chapter 17, Problem 123AE

Interpretation Introduction

Interpretation:

The reaction taking place in grain alcohol and Oxygen in a fuel cell is given. The theoretical maximum voltage that given cell can achieve at 25 °C for the given amount of maximum work is to be calculated.

Concept introduction:

Gibbs free energy is basically the maximum amount of non-expansion work done. Therefore, it is represented as,

Wmax=ΔG°

The maximum amount of work that is done by an electrochemical cell is given as,

Wmax=nFE°cell

The relationship between Gibbs free energy change and equilibrium constant is given by the formula,

ΔG°=−nFE°cell

To determine: The value of theoretical maximum voltage that given cell can achieve at 25 °C .

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