Problem: Consider a fuel cell that uses the reaction of ethanol with oxygen to produce electricity, CH3CH2OH(l) + 3O2(g) → 2CO2(g)+ 3H2O(l)Determine the E°cell for this cell at 25°.E°cell = v

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FREE Expert Solution

We’re asked to calculate the cell potential (E°cell)­ of a fuel cell. The cell potential of an electrochemical cell is related to Gibb's free energy of the reaction by the following equation:

∆G° = Gibb’s Free Energy
n = number of electrons transferred
= Faraday’s constant = 96485 C/(mol e-)
cell =standard cell potential

We will solve the problem in the following steps:

1. Calculate ΔG˚rxn (since it is not given)
 2. Determine the number of electrons involved in the reaction by balancing the redox reaction
 3. Calculate E˚cell using the equation above.

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Problem Details

Consider a fuel cell that uses the reaction of ethanol with oxygen to produce electricity, 

CH3CH2OH(l) + 3O2(g) → 2CO2(g)+ 3H2O(l)

Determine the E°cell for this cell at 25°.

cell = v

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Based on our data, we think this problem is relevant for Professor Madison's class at PITT.