# Free energy and Chemical Energy question

1. Jul 31, 2011

### gkangelexa

$\Delta$G = -n F Emax

and

$\Delta$G = $\Delta$G$\circ$ + RT ln(Q)

When do we use the first equation and when do we use the second one?

2. Aug 1, 2011

### Mike H

The first equation contains the Faraday constant. What sorts of chemical systems/problems would entail needing to use that?

What do the two terms on the right-hand side of the second equation represent?