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

The standard voltage that could be obtained from a fuel cell using this reaction can be calculated using the formula:

ΔG° = -nF E°cell

where ΔG° is the standard free energy change, n is the number of moles of electrons transferred (in this case, 4), F is the Faraday constant (96,485 C/mol), and E°cell is the standard cell potential.

Rearranging the equation, we get:

E°cell = -ΔG°/(nF)

Substituting the given values, we get:

E°cell = -(-1818 kJ/mol)/(4 mol e^- x 96,485 C/mol) = +1.06 V

Therefore, the best choice is (E) +1.06 V.

If the Standard Free Energy Change for Combustion of 1