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Hydrogen Power

  1. Mar 22, 2009 #1
    How much hydrogen gas can be separated from salt water for every kilowatt/hr of energy? Rough approximations are fine.
  2. jcsd
  3. Mar 22, 2009 #2
    And how to collect the hydrogen?
  4. Mar 22, 2009 #3


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    Staff: Mentor

    Well, the bond energy of water is 918 kJ/mol or 51 kJ/g. If electrolysis is typically 75% efficient, you'd need 68 kJ/g. A kWh is 3.6MJ, so that's 529 g/hr.
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