### Delta G and delta Gr

Posted:

**Wed Feb 19, 2020 7:01 pm**Hi!

Just wondering the difference in the two equations listed in the book for Gibbs free energy:

ΔG=-nFE

ΔG

They look very similar but the book states the second is in "molar form", so that the units are KJ/mol. Not really sure what this means or when to use one instead of the other. Thank you!

Just wondering the difference in the two equations listed in the book for Gibbs free energy:

ΔG=-nFE

_{cell}ΔG

_{r}=-n_{r}FE_{cell}They look very similar but the book states the second is in "molar form", so that the units are KJ/mol. Not really sure what this means or when to use one instead of the other. Thank you!