Some (possibly wrong) chemistry: Hydrogen has a specific energy of 142 MJ/kg [0]. 1 water molecule has 2 Hydrogen molecules and 1 Oxygen molcule. Hydrogen has

Some (possibly wrong) chemistry: Hydrogen has a specific energy of 142 MJ/kg [0]. 1 water molecule has 2 Hydrogen molecules and 1 Oxygen molcule. Hydrogen has a molecular weight of 1, while Oxygen has a weight of 16 [1][2]. This means that, by weight, water is about 1/9th hydrogen. So 9kg of water should give us 142 MJ worth of Hyrdogen. Gasoline is about 46 MJ/kg [0], so 3kg of water should give us the equivelent of 1kg gasoline. Gas has a density of .77 kg/L [3], water has a density of 1kg/L [4]. So 3L of water, should be about 2.31L worth of Gas. Also, if we keep the water that results from burning hydrogen we may be able to avoid needing to re-purify it. [0] https://en.wikipedia.org/wiki/Energy_density https://en.wikipedia.org/wiki/Energy_density [1] https://www.google.com/search?q=water+molecular+weight&oq=water+molecular+weight&aqs=chrome.0.0l6.4825j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8#q=oxygen+molecular+weight https://www.google.com/search?q=water+molecular+weight&oq=wa... [2] https://www.google.com/search?q=hyrdogen+molecular+weight&oq=hyrdogen+molecular+weight&aqs=chrome..69i57j0l5.6122j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8 https://www.google.com/search?q=hyrdogen+molecular+weight&oq... [3] https://www.google.com/search?q=gasoline+density&oq=gasoline+density&aqs=chrome.0.0l6.2402j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8 https://www.google.com/search?q=gasoline+density&oq=gasoline... [4]https://www.google.com/search?q=gasoline+density&oq=gasoline+density&aqs=chrome.0.0l6.2402j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8#q=water+density+kg/L https://www.google.com/search?q=gasoline+density&oq=gasoline...