Charles BrooksENMA 490ElectrolysisThe Principlehttp://www.nmsea.org/Curriculum/7_12/electrolysis/electrolysis.htmenergy (electricity) + 2 H 2O ->! O 2! + 2 H 2Energy Associatedhttp://hyperphysics.phy-astr.gsu.edu/hbase/thermo/electrol.htmlThe amount of chemical change is proportional to the amount of charge passedV = R I T t / F p zV: volume R: const I: current T: temp (K)F: Faraday const p: pressure z: # exces electFaraday’s First Law of ElectrolysisFor p = 1 atm, R = 8.314, F = 96485, T = 293, I = .5 amps, t = .2 sec, z = 2 for H2 and 4 for OVolume change = V (H2) + V (O)V = 1.26E-8 + 2.52E-8 = 3.78E-8 m^3or a 3 mm x 3 mm x 3 mm volumefor a .5 x .5 x .5 mm volume, I = .014 ampsRough CalculationsOnce water has been converted to hydrogen and oxygen gas, reverse reaction may not occurReverse electrolysis is process by which a fuel cell worksPotential
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