Page:Philosophical Transactions of the Royal Society A - Volume 184.djvu/108

From Wikisource
Jump to navigation Jump to search
This page needs to be proofread.
PROFESSOR H. B. DIXON ON THE RATE OF EXPLOSION IN GASES.
109


under the same conditions, so that the results found at 100° must be accepted.[1] A similar lowering of the rate at 100° was found to occur at low and high pressures.

TABLE VIII.

TEMPERATURE Experiments. H, + 0. Temperature. 10° 100°. Mean rato 2821 2790 H,+ O at 100° C. at different pressures. Pressure. 390 mm. 500 mm. 760 mm. 1000 mm. 1450 mm. Mean rate 2697 2738 2790 2828 2842

When the rates at 100° and varying pressures are compared graphically with the rates found at 10° and varying pressures, it is seen that the two curves run parallel one with the other (see fig. 1 on Plate 1).

The explosion-rates of ethylene and oxygen at 10° C. and 100° C. were also com- pared. Samples of the same mixture were exploded alternately at the low and at the high temperature. Five concordant determinations at 10° C. gave a mean velocity of 2581 metres per second; four concordant determinations at 100° C. gave a mean velocity of 2538 metres per second. Similar experiments were made with cyanogen,

TABLE IX. RATE of Explosion of Ethylene and Oxygen. C,H, + 20%. Temperature. 10° C. 100° C. Mean rate 2581 2538

RATE of Explosion of Cyanogen and Oxygen. CN + 0, Temperature. 10° C. 100° C. Mcan rato 2728

2711

  1. The expansion of the metal tube is taken into account in calculating the rates at 100° C.