We’re being asked to write the overall chemical reaction for the fuel cell, and list the product(s) released from the cell.
Recall the mnemonics LEO GER.
An illustration of an ethanol fuel cell is given below:
The half reactions (written as reductions) for the fuel cell at 25 °C are given below.
O2 (g) + 4 H3O+ (aq) + 4 e- → 6 H2O (l) ε°red = 1.23 V
CH3COOH (aq) + 4 H3O+ (aq) + 4 e- → CH3CH2OH (aq) + 5 H2O (l) ε°red = ???
acetic acid ethanol
Write the overall chemical reaction for the fuel cell, and list the product(s) released from the cell.
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