Service Chemistry Being a Short Manual of Chemistry And Metallurgy And Their a
Service Chemistry Being a Short Manual of Chemistry And Metallurgy And Their a
Vivian Byam Lewes
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The following table, corrected by Noble in 1905, shows the heat developed by Cordite Mark I, Cordite M. D. , and a nitro-cellulose powder, with three different densities of charge : Cordite Density Mark I. Cordit e M. D. Nitro-cellulose. charge. 6 a b a b 0-45 5090 5090 4713 4624 4305 3954 0-40 4902 4970 4494 4411 4007 3890 0-35 4710 4860 4200 4215 4630 3795 1 The figures show the temperature of explosion in centigrade degrees, those under a being calculated from the pressures, whilst those und...er b from specific heats. The Potential Energy of any explosive will depend on two factors, namely, the actual volume of the gas generated (calculated for comparison under standard conditions) and on the tempera- ture developed on explosion, whereby the gases become enormously expanded. It has been shown that high temperatures are undesir- able, hence to obtain the same potential energy the gas yield must be increased, either by actual chemical decomposition or increase of charge. The production of carbon dioxide leads to high temperatures and low gas volumes (under standard conditions of measurement), whilst the production of carbon monoxide yields much lower temperatures but greater gas volume, thus a much greater gas volume (at and 760 mm.
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