Cell EMF & Gibbs Free Energy

Calculate cell potential and ΔG from standard electrode potentials or Nernst equation.

E° cathode (V)

E° anode (V)

n (electrons transferred)

E°cell = --- V

ΔG° = --- kJ/mol

E°cell (V)

Temperature (K)

n (electrons transferred)

Reaction quotient Q

Ecell = --- V

ΔG = --- kJ/mol

E°cell = E°cathode – E°anode

ΔG° = –n F E°cell (F = 96485 C/mol)

Ecell = E°cell – (RT/nF) ln Q

ΔG = –n F Ecell

To convert J to kJ, divide by 1000.