Given the standard free energies of formation in Appendix B in the textbook, what is the value of for the cell reaction?
CH4(g)+2O2 -----> CO2 (g) + 2H2O (l)
the delta G's in the book are as follows
CH4(g)------------> -50.8
O2(g)----- 0
CO2(g)---------> -394.4
H2O (l)---------> -237.2