A joint committee of the two
chambers will decide on the
entire powers and structure of the
second chamber, with members of both houses allowed a free vote on its proposals.
And, once you are dealing with situations involving any sort of macroscopic amount of material, the statistics become overwhelming, so that the chance of the pressure in the high pressure
chamber increasing while the pressure in the low pressure
chamber decreases becomes so astronomically small that it ain't going to happen even if you carry out the experiment once a
second for the
entire lifetime of the universe.