[sn1sn2e1e2]

C3H8 + 5O2  3CO2 + 4H2O

ΔG°=-nF(E°cell)

In order to identify the "n" value, do you include the coefficients next to the elements?

Like 5O2 is 10 oxygen atoms WITHOUT electrons.

On the other side, now all 10 oxygen atoms have electrons so 20 electrons were transferred.

Am I right? (including the coefficients to identify the electrons transferred)

BTW, is there any other better way of seeing how many electrons were transferred in a reaction?

Thanksss

[Rutherford]

n is the number of electrons transferred per one mole of the substance (just as ΔG). ΔG is most probably defined as kJ/(mol of propane), as propane has coefficient 1. The net oxidation of the carbons is -8 while in carbon dioxide it is +12, so 20 electrons are released. If ΔG was expressed through moles of oxygen, then it would have a five times smaller value, also n would have a five times smaller value, too (as 4 electrons are needed to reduce a molecule of oxygen), so there wouldn't be any difference, as it shouldn't.