Humans have invented a technology that allows for teleportation of matter across any distance. These devices can, in theory, be scaled up to any size, so long as the necessary construction materials are available.
The drawback is that, while any matter can be transferred, there is no way to reassemble it on the other side. Anything that goes in will come out as a cloud of loose particles. In some cases this can mitigated, like re-condensing water vapor, or melting down metallic dust and forming it back into it's original shape.
Of course, matter that is already in a particulate form goes through completely intact. Because of this, one of the primary uses of this technology is weather control. Need more rain for crops? Just transfer some from an urban area where it is not wanted.
Now, scientists are preparing to construct an array of these devices and placing one side of each on Venus and the other side on Mars. Transferring part of Venus's atmosphere to Mars is the first step in a long term plan to terraform both. Future plans include transferring vast amounts of ice particles from elsewhere in the solar system to establish bodies of water and transferring organic soil "dust mulch" in which to kick start plant growth.
Now for my actual questions:
1) Would the difference in atmospheric pressure cause too violent of a transfer? How might this be mitigated?
2) Would the thick, heavy atmosphere on Venus eventually equalize with the thin atmosphere on Mars?
3) If so, would the resultant pressure and chemical makeup of both atmospheres be even close to survivable for humans? Close enough that additional measures could reasonably be taken to make it survivable? Or deadly enough that this whole operation was pointless?
4) Assuming viability, could this process be completed within a reasonable amount of time?
5) To what extent could these devices be used to continually equalize temperature between the planets after atmospheric equalization has been established?