A ΔG in kJ/mol multiplied by a sufficiently large number of moles could also produce a large negative ΔG.
no
multiplying ΔG ( in kJ/mol ) by some value with the dimension "mol" won't gain you another Δ G ( in kJ/mol) thereafter, but something with the dimension of "energy" (i.e. kJ ) instead: the total energy (here: released) if so ans so much moles of reaction would have taken place
... and of course , this value would (here:) increase with more stuff (i.e. ozone) to be destroyed, as the absolute amount of energy released is a clear function of the amount of stuff you treat with the respective process
burn a lot of coal and gain a lot of heat , it's as simple as that
nevertheless, the amount of heat released
per a given amount of coal still remains a constant
... and it's the same with ΔG , as it is related to a well-definded amount of things happening (usually one mole of formula reaction)
hence, ΔG is and remains independent from the number of moles processed
regards
Ingo