Help pleaseSomeday, cars may be powered by clean H2/O2 fuel cells and electric motors. Under standard conditions, such a fuel cell can develop 1.229 volts. If the oxygen is obtained from air (at P0.21 bar), what pressure of H2 would be required to develop 1.214 volts from the cell at 25 C?
This is actually electrochemistry, and is a pretty weird question. First use the Nernst equation. EcellE*cell-0.0592/n*logQ; after plugging in the numbers you have listed above and using 4 as n (the number of electrons), you get: 1.2141.229-0.0148*log(1/x^2*0.21); you may want to check your numbers and reverse the Ecell values to get a positive result. From this point, just solve for x.
