Q1) An inventor wants to build a hydrogen manometer based on the dependence of the output voltage of a fuel cell on the pressure of the reactants. Take a H,/O, fuel cell operating at 298 K. Assume that it produces water vapor and that the open circuit voltage is that of an ideal cell. The oxygen pressure is maintained at a constant 0.103 MPa while the hydrogen pressure, pH2 , measured. What is the output voltage when pu2 are 0.103 and 1.1 MPa? the free energy change is -230 MJ/kmole of H,O at RTP. Use Gas constant R: 8314 J mol" K is the quantity to be

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