Compute the standard free energy change for the following reaction.?

Question

Compute the standard free energy change for the following reaction.
PbO2(s) + 2 Ni(s) --> Pb(s) + 2 NiO(s)

Answer 1

Use the values of free energy change for each substance,G found in a chemistry book appendix. Then do the Products - Reactants.

G[0]+2G[-216]-G[-217.33]-2G[0]
G=-214.67 kJ

Answer 2

1. look up the Gibbs free energy of formation of NiO and PbO2
2. subtract the latter from 2 x the former.