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Water damage... causes
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<blockquote data-quote="Jay Barracato" data-source="post: 48584" data-attributes="member: 24"><p>Re: Water damage... causes</p><p></p><p>What is a chloride salt reduced to? </p><p></p><p>Sulfate can be reduced but the E value is beyond that of water, in other words the water will react first IF a great enough voltage is present. As a matter of fact sulfuric acid is the classic electrolyte to use in the hydrolysis of water.</p><p></p><p>As far as I can tell, on a macro scale based on the composition of sea water, the only spontaneous pairing with iron is oxygen (ln K= 256). If a voltage of .42V is provided, then water itself is the material reduced (ln K= -33).</p><p></p><p>Our choosing to describe an equilibrium thermodynamically or by the law of mass action doesn't change the equilbrium position itself, and I would say that yes when considering a real system you must consider the kinetics, even if it is not directly affected by the state function for the thermodynamic description. The classic example is that of a diamond which according to thermodynamics spontaneously degrades into graphite. However, the activation energy is so large that the rate of change is so small that for all practical purposes a diamond is stable enough to be considered at equilibrium. In a case of competing equilibria, you must consider the rate at which the various species are modified by each of the pathways they can enter into.</p><p></p><p>P.S. Given the nature of the original photos, I never thought it was other than a film of water in an oxygen rich atmosphere in the presence of a current.</p></blockquote><p></p>
[QUOTE="Jay Barracato, post: 48584, member: 24"] Re: Water damage... causes What is a chloride salt reduced to? Sulfate can be reduced but the E value is beyond that of water, in other words the water will react first IF a great enough voltage is present. As a matter of fact sulfuric acid is the classic electrolyte to use in the hydrolysis of water. As far as I can tell, on a macro scale based on the composition of sea water, the only spontaneous pairing with iron is oxygen (ln K= 256). If a voltage of .42V is provided, then water itself is the material reduced (ln K= -33). Our choosing to describe an equilibrium thermodynamically or by the law of mass action doesn't change the equilbrium position itself, and I would say that yes when considering a real system you must consider the kinetics, even if it is not directly affected by the state function for the thermodynamic description. The classic example is that of a diamond which according to thermodynamics spontaneously degrades into graphite. However, the activation energy is so large that the rate of change is so small that for all practical purposes a diamond is stable enough to be considered at equilibrium. In a case of competing equilibria, you must consider the rate at which the various species are modified by each of the pathways they can enter into. P.S. Given the nature of the original photos, I never thought it was other than a film of water in an oxygen rich atmosphere in the presence of a current. [/QUOTE]
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