Determine the maximum efficiency and open circuit voltage

Question

Repeat given Problem for the case where the reactants are premixed to a total pressure of 0.100 MPa at 25.0°C.

Problem:

Determine the maximum efficiency and open circuit voltage for the methane?oxygen fuel cell,

CH₄ + 2(O₂) → CO₂ + 2[H₂O(l)],

when each component in the reaction is at 25.0°C and 0.100 MPa.