1. A fuel cell uses methane as fuel instead of hydrogen. The reaction is CHA(g) + 202(g) CO2(g) + 2H20m) Chemical compound AH; (kJ/mol) SS /(mol.K)] CH, -74.81 186.26 02 0 205.00 CO2 -393.51 213.79 H2O -285.83 69.95 (a) Calculate the AHPXn, As xn and AG Xn for this reaction for one mole of methane. Assume the reaction takes place at standard conditions. (b) Determine the theoretical potential and efficiency of the cell, and the amount of waste heat produced for each mole of methane fuel. (c) The fuel cell might operate at a voltage of 0.68 V, 11 A and 2. = 1.15. Determine the fuel cell efficiency, electric power and heat. Assume pure oxygen at the cathode. (d) If we operate the fuel cell at 40 C on 3.5 atm pure CHa, 6 atm air and 3 atm CO2, predict a reversible cell voltage. Partial pressure of oxygen in air is only 0.21. (e) The fuel cell generates 1100 kA and is supplied with air at 23 mol/s. The molar fraction of oxygen in air is 0.21. Calculate the oxygen output flux from the fuel cell, the water and CO2 generation rates (or methane consumption rate). 2. (a) Explain major advantages and disadvantages of fuel cells, as well as at least two potential applications where the unique attributes of fuel cells make them attractive. (b) Describe the methods used in the production, transportation, distribution and storage of hydrogen. (c) Explain the future development of batteries and fuel cells