Estimate the amount of energy (G°\') which is potentially available from one mol

Question

Estimate the amount of energy (G°') which is potentially available from one mole of toluene (C7H8) under five different electron acceptor conditions (aerobic, denitrifying, sulfidogenic, iron-reducing, and methanogenic). Assume STP and pH 7 for simplicity. The free energy of formation is 113.8 kJ/mol for toluene.

Hint: Keep in mind that toluene is the electron donor under all conditions. For anaerobic conditions, the redox pairs for electron acceptors are listed below.

Denitrifiers: NO3-/N2

Sulfate reducers: SO42-/H2S

Iron reducers: Fe(III)/Fe(II)

Methanogens: CO2/CH4

The free energy of formation for methane is -50.8 kJ/mol. For simplicity, please ignore the hydrolysis of weak acids or basics involved in the oxidation-reduction reactions.

Explanation / Answer

THE FREE ENERGY WILL BE -50.8 kJ/MOL -(-113.8) =   63 KJ/MOL

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.