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In a hydrogen-oxygen fuel cell, gaseous hydrogen serves as the fuel, oxygen in the air as...

In a hydrogen-oxygen fuel cell, gaseous hydrogen serves as the fuel, oxygen in the air as the oxidizer, and the reaction product is water. Consider that flat plates of Pt are used as electrodes at 25°C and fuel and air are supplied at 1 atm. [20%] (a) Write the Nernst expression for each half-cell reaction. (b) What is the overall cell reaction? (c) Calculate the cell voltage, Ecell, given the above conditions. (d) Suppose that the supply of hydrogen and air were increased to 10 atm. How does this change the cell emf?

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