Answer
The ΔG value for the uncoupled reaction is inferred to be +1.3 kcal/mol, whereas in step 1 of the coupled reaction, $(A+B+ATP→AB-P+ADP), (ΔG≈−3kcal/mol)$.
Work Step by Step
Uncoupled reactions require energy input and are endergonic in nature, whereas reactions that are coupled with the hydrolysis of ATP are exergonic reactions.
