Consider these hypothetical chemical reactions:
1. A <—> B, Delta G = 12.6 kJ/mol
2. B <—> C, Delta G = -28.4 kJ/mol
3. C <—> D, Delta G = 7.60 kJ/mol
What is the free energy, Delta G, for the overall reaction, A <—> D?
Express your answer numerically in kilojoules per mole.
The B’s cancel out. The C’s cancel out. Therefore all you have to do is ADD the Delta G’s for all three processes.