Hi guys this is all misleading saying 4 US gallons a min he is talking about volume in a one gallon container. One litter of liquid water, it will fill a one litre container. So empty the liquid it will fill up with air, one litre of air by volume.
In one litre of water there is 111 moles hydrogen when in a gas form will turn into 22.4 x 111 = 2,486.4litres in volume. There is also 888 moles of oxygen.
One us gallon is 3.7854ltres, so a few cc of water would easily fill a gallon.
You could work it out if you want. The is a more exciting way to do it, fill the gallon container with the gas, ignite it, there will be water left if you can find it, this had been done in a lab with a seal container and ignited so the water could be found, it can also be done by compression. A hydraulic ram was used and the gas collapsed under pressure then they measured the water. The rocket engine does the same but with a difference, a stoichiometric 2:1 ratio mix 2 hydrogen and one of oxygen is separately putting to a chamber and ignited, the released energy turned it all to water vapour that’s all the white stuff that as condensed, the supercritical steam cannot be seen, it will go blue then white steam.
