What is the gas? (Adams & Co)

It is of molecules which cannot group, losing the electric force and the gravity force.
Why do they lose both of it? Just because of being spacious and stimulated enough.
All of them are very small in their space, so to speak, as a rigid body, a dust.
Entropy energy can be said a force which is passive, the amount of impact from outside.
Entropy means from outside. Not from one's own reason or calculation.
So the Avogadro's constant.
　(Thank you very much. )