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Author: Subject: Energy for elekrolysis
Wolfram
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[*] posted on 13-10-2003 at 10:38
Energy for elekrolysis


How much energy in J is needed to turn 1 liter of water to O2 and H2?

Thanx for your help
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vulture
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[*] posted on 13-10-2003 at 10:43


I'm not giving you the answer. Why not? This is not a please-solve-my-homework board.

Instead, I'm going to ask you how you thought to deal with this problem.




One shouldn't accept or resort to the mutilation of science to appease the mentally impaired.
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Wolfram
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[*] posted on 13-10-2003 at 11:56
This is not my homework.


This is not my homework.
I would take the free energy of formation for h2o which is -237 kJ / mol and multiply with 55 mol which there are in one liter of water. The answer inverted would be the amount of joule needed. I guess.
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madscientist
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[*] posted on 13-10-2003 at 18:44


You need to take in account the energy released when the products (H<sub>2</sub>, O<sub>2</sub>;) are formed.



I weep at the sight of flaming acetic anhydride.
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[*] posted on 14-10-2003 at 03:35


No, standard heats of formation are relative to elements in their standard state.
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