If the standard free energy change for combustion of 1 mole of CH₄(g) is -818 kJ.mol^{-¹,Calculate the standard voltage that could be obtained from a fuel cell using this reaction.}

Question

Quizplus · Accepted Answer

We can use the equation:

∆G° = -nFE°cell

where n = moles of electrons transferred in the reaction (in this case, n = 8) and F is the Faraday constant (96,485 C/mol e-).

Rearranging the equation:

E°cell = -∆G°/(nF)

Plugging in the values:

E°cell = -(-1818 kJ/mol)/(8 mol e- * 96,485 C/mol e-) = +1.06 V

Therefore, the answer is (E) +1.06 V.

If the Standard Free Energy Change for Combustion of 1