This really isnt a HW problem, but this seemed like the best place to post my question. Imagine a modern city's water cycle. Clean water is obtained from a river or from groundwater, and this water is used for drinking, bathing and industrial uses. Afterwards the water is fouled biologically and chemically. Next this very dirty water is sealed in a chamber, and a plasma arc (temp of 25,000° C) inside heats it until all of the water and contaminants turn into plasma (all chemical bonds broken). Question: If the plasma is allowed to cool, will the heavy atoms form a solid at the bottom of the chamber? Question: Will the ionized Hydrogen and Oxygen atoms immediately turn back into water when cooled, or will they be separate gases?