CLX.—The measurement of a homogeneous chemical change in a gas. (The thermal decomposition of ozone.)
Journal of the Chemical Society Transactions
JUDGING by the published experience of those chemists who have made a special study of chemical changes in gases during recent years, and particularly since Victor Meyer investigated the conditions of the union of hydrogen and oxygen, we should doubtless be compelled to conclude that slow pyrogenic changes in gases have their seat of action principally, if not entirely, on the walls of the enclosing vessels, and that any attempt to measure the velocity of change within a gas itself would be
... itself would be unsuccessful, owing to the impossibility of estimating the precise effect of surface. A moment's consideration, however, will make it clear that if we could be certain that only a small fraction of the total chemical change were confined to the gas not in the neighbourhood of the walls of the containing vessel, then the effect of surface might be almost entirely eliminated by increasing the size of the vessel until the ratio of its internal surface to its volume became very small. The only difficulty in the way of measuring the velocity of a homogeneous chemical change in the gas would then be the practical one attending the use of a vessel the dimensions of which were large enough for the purpose.