So the molecules are not connected they are just touching. They can be separated. Some molecules stay in the container and some are removed by the pump and go somewhere else on Earth.
You have again said a pump works by pushing on the air. THE PUMP CANNOT WORK BY ONLY PUSHING ON THE AIR. All you have to do is reverse the seal on a bicycle pump to cause air to flow into the bicycle pump. Likewise you can take a one dollar syringe and put your finger over the end and pull on the handle to reduce the pressure and when you release the handle the handle shoots back inside to where it was before you pulled and created that low pressure. Obviously nothing is pushing on the air to create the low pressure. The same goes for a car engine which creates low pressure and enables the air and fuel to flow into the engine. The same for a vacuum pump.
>>This pushes the air on the outside of the container away, because it has to prevent any more getting inside. At a basic level, this means that in the immediate area outside the hole , there is a lower pressure of air.
I totally have not one single clue what you are talking about. Pushing on air cannot reduce pressure in a container.
You need to accept the axioms of the model first. That much should be obvious. Take your syringe case:
| -------|
| -------|For an exceptionally poor diagram. Consider that the syringe at 'resting' rate, with the plunger all the way in. Equal pressure inside and outside, and we assume it's perfectly sealed (impractical in reality, but hey). We also treat this as one dimensional so I can explain what direction forces act in.
Now, pull the plunger out:
| --------|| --------|Red denotes higher, 'normal' pressure. The air that filled the smaller space in the first diagram has now expanded to fill the whole chamber inside the syringe, so it's at a much lower pressure.
What are the forces? Well, there's a force pushing the plunger to the right, because the outside's in contact with the air, and they'll push on everything. The force is notable, though, because it's not balanced: the force inside the chamber that pushes left, to keep the plunger out, is far lower than the pressure on the outside. So the moment you release the plunger, the air on the outside will push right, because it can: there's a direction
to push, because of the lower concentration.
Release the plunger, you end up with the first diagram, where the forces acting on the plunger are equal.
It's much the same principle for the vacuum chamber:
(chamber) | (outside)
If you put a vacuum pump here at the boundary, simplistically put it pushes molecules to the right. This means there is no leftwards force acting on the molecules in the chamber to keep them compressed: so, by the previously stated axiom, the molecules seek to expand. They're always trying to expand: it takes the application of a force to compress them.
The
lack of the leftwards force means molecules expand to the right. They push to the right, and so leave the chamber.
That's simplified, but hopefully it's clearer.
If you're more interested in thinking of it mathematically, this might help:
We create the container, poke a hole in the side, and the pressure of air inside and outside is equal.
So, the pressure exerted by the air inside the container (remembering that under this model
only push forces exist) is an outwards force denoted F
c (for container).
The pressure exerted by the air outside the container is an inwards force we denote F
e (for everywhere).
If the pressures are balanced, clearly F
c = -F
eSum the two forces, you get zero: no change.
The presence of a vacuum pump, essentially means F
e shrinks to zero (or at least nearer to zero), so suddenly at that point of the container:
F
c > -F
eSo if these are the only two forces at play, the pushing force of F
c dominates, and you'd get net behaviour
outwards.