File:A Theory of the Chemical Action of the Electric Discharge in Electrolytic Gas (1911) (14801071233).jpg

Identifier: philtrans09259144 (find matches)
Title: A Theory of the Chemical Action of the Electric Discharge in Electrolytic Gas
Year: 1911 (1910s)
Authors: Kirkby, P.
Subjects: Proceedings of the Royal Society of London Philosophical Transactions of the Royal Society
Publisher: Royal Society of London

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35-2 6-5 6-5 6-5 6 •5 7-0 88-3 38-9 1 10-5 1 43-4 10-5 49-7 Notation oe Table I. J? = the mean pressure during tlie discharge in millimetres of mercury.Ap = the fall of pressure produced by the discharge.C = the current of the steady discharge in amperes, so that the second column gives thecurrent in milliamperes.aQ = the quantity of electricity in coulombs passed through during the discharge (C^).D = distance between the electrodes. ■\Y = the number of molecules of water produced by the passage of the atomic quantity ofelectricity between the electrodes = 1*69 x A^/aQ, ~ the total chemical activity of thedischarge.w — the difference of the greatest and least values of W divided by the difference of the corresponding values of D = the chemical activity of the positive column.Y == the electric force (volts per centimetre) of the positive column.q — the distance from the cathode of the nearest part of the positive column. 1910.) Electric Discharge in Electrolytic Gas. Fig.3 161
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the two discrepant values of i^; corresponding to the same pressure 1*4 mm.This discrepancy lies far beyond the errors of observation, but is fullyexplained by the concomitant discrepancy in the values of Y, which ispossibly the effect of the presence of water vapour. In facfc each value ofvj is related to the corresponding value of Y in the manner required by thetheory within the limits of experimental error. Limits of Experimental Errors. The errors involved in the various values of Ap/AQ and therefore of Wwere in most cases probably less than 5 per cent. The largest valuescorresponding to the largest values of D when repeated seldom differed bymore than that, and sometimes the agreement was much closer. If thesame order of error is assumed in the least values of W, which are a smallfraction (generally about one-third or one-fourth) of the greatest values, thevalues of w, which depend on the difference of greatest and least values,would have a rather greater error-limit, 7 or 8 per

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