In this answer by Steeven on the meaning of Enthalpy, the following image is used to explain it:
In this comic, I don't understand two things:
Why is the energy required to make space for the rabbit exactly given as $pV$? How would we prove that it is so from first principle?
It is said that magician only has to expend the energy $G$ as work, this suggests that the creation of rabbit from thin air is positive entropy process... but how do we know that? To me, it should be a negative entropy process since the rabbit's whole body is a highly complex and highly ordered thing.
I have also seen this post which asks a similar question but I felt the answers were unsatisfactory.