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Electrolysis calcul with faraday

  1. Mar 9, 2016 #1
    Hello felow's my boy of 15 years old asked a question about an exercice at college, he asked me how much electricity it would take to generate electrolysis on a sea surface of 100 feet wide and half a mile long.

    I told him (jocking) you may use some kind of nuclear facilities

    I thought using Faraday loies could help me but I'm buging, thank you advice in any case

  2. jcsd
  3. Mar 9, 2016 #2


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    Hello and :welcome:

    First of all you need a lot of cable :smile: .

    But the electrochemical processes do not really depend on the distance between the electrodes: the sea can be supposed to be at zero potential and the processes are driven by potential difference.

    If you want to electrolyze a substantial amount of sea water, you need a lot of current and thereby a lot of electrode area.

    And the fish won't be all that happy with the chemical products !
  4. Mar 9, 2016 #3
    Hello BvU

    first thank you for your answer it's nice :) i will tell him about the electrodes first.

    so for your what kind of energy are we talking ?maping 100 feet wide and half a mile long of multiple electrode.

    Fish may won't be all that happy you right , a good way of fishing lol
  5. Mar 9, 2016 #4


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    Problem example 2 in this link works it out: 5580 MegaJoule for 1000 kg of Cl2.
    The 100 ft and the half mile don't really come into it - except that you need a lot of area and small distance between cathode and anode to get down to the cells operating at 2 Volt.

    So what's the problem formulation for this exercise at college ? Sounds ambitious !
  6. Mar 9, 2016 #5
    example 2 look good thank you for the link BvU, yes i think the formulation is wrong somewhere, i will ask the professor

    thank you
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