If the reaction A B has DG = +25 Joule/mol and the reaction B C has DG = -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 the reaction A to C is the sum of the energy changes for A to B and B to C. Therefore, DG = +25 Joule/mol + (-15 Joule/mol) = +10 Joule/mol.

If the Reaction a B Has DG = +25 Joule/mol