If the reaction A → B has Δ G = +25 Joule\mol and the reaction B → C has Δ G = − 15 Joule\mol, the overall energy change A → C will be
A) − 40 Joule\mol.
B) − 15 Joule\mol.
C) +10 Joule\mol.
D) +40 Joule\mol.
E) You cannot determine the overall reaction from the given data.

Question

Quizplus · Accepted Answer

The overall energy change for a series of reactions is the sum of the energy changes for each step. So, for A → B → C, the overall ΔG = ΔG(A → B) + ΔG(B → C) = +25 J/mol - 15 J/mol = +10 J/mol.

If the Reaction a → B Has Δ G =