Like Tree2Likes
  • 1 Post By mobtrio
  • 1 Post By imparanoic

Does the production of hydrogen through water consume water?

Closed Thread
  1. #1

    Join Date
    Nov 2014
    Posts
    853

    Does the production of hydrogen through water consume water?

    Something I have been wondering for a while.

    If you produce electricity using hydrogen, when the hydrogen burns you get water. But the water that you get is less than the water you put in, since you also have heat. Right? How much water does one use?


  2. #2

    Join Date
    Oct 2006
    Location
    Sarcasm - because beating the crap out of people is illegal
    Posts
    14,622

    I.

    Just.

    No.

    Can't.


  3. #3

    Join Date
    Oct 2014
    Posts
    297

    No, there is no water missing. Something like this: waterA + energyA ==> hydrogenA + heatA ==> waterB + energyB + heatB, where waterA is same with waterB and energyA is same with energyB + heatA + heatB.

    imparanoic likes this.

  4. #4

    Join Date
    Jan 2008
    Posts
    11,711
    Electrolysis of water - Wikipedia, the free encyclopedia

    basic physical chemistry (haven't dealt with this since a levels) thus my understanding maybe flaky

    both water and energy are not consumed ( ie, disappears) ;-

    Water is split to Hydrogen and Oxygen via Electrolysis ( electrical current ), thus, the substance is split to their simplest elements, nothing is actually lost ( neither energy or molecules)

    On the other hand, the electrical is change to different form of energy ( heat) as the temperature increases
    mobtrio likes this.

  5. #5

    Join Date
    Oct 2014
    Posts
    297

    Yes, but think of it. We can say that some water are 'disappear', in form of steams...


  6. #6

    Join Date
    Jan 2008
    Posts
    11,711
    Quote Originally Posted by mobtrio:
    Yes, but think of it. We can say that some water are 'disappear', in form of steams...
    might as well as water has 'disappeared' to colourless and scentless oxygen and hydrogen, thus, you would not notice if this transition as it's not visible to the naked eye

  7. #7

    Join Date
    Oct 2006
    Location
    Sarcasm - because beating the crap out of people is illegal
    Posts
    14,622

    First you don't start with water. You start with hydrogen gas and a fuel cell.

    The fuel cell has an anode and cathode. At the anode, the hydrogen is split into protons and electrons. It is the electrons that go to a battery attached to the electric motor, which turns the wheels. When the hydrogen electrons and protons reach the cathode, they are reunited and combine with oxygen (from the air) to form water, which is supposed to be clean enough to drink.

    So, you don't start with water but you end with it.