It is often stated that all the air in a room could suddenly rush into one corner but that there is simply a very low probability that it would do so. One possible way this could in fact happen is via the phase change of gas into a solid via really low temperatures.
What is the smallest possible way of packing a 1 by 1 by 1 meter box of Nitrogen gas that starts at standard temperature and pressure that is still Nitrogen and not some other kind of matter such as Neutronium or Lead?