Chemical explosive | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-30

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Chemical_explosive


00:00:53 1 Chemical explosive reaction
00:01:57 2 Sensitiser
00:02:20 3 Measurement of chemical explosive reaction
00:04:00 4 Balancing chemical explosion equations
00:05:38 5 Example of thermochemical calculations
00:07:06 6 References
00:07:48 Qfi (products) − Qfk (reactants)where: Qf
00:08:06 2(26.343) + 4(57.81) + 3(94.39) − (119.4)
00:08:36 0.572Nm
00:08:51 6.292 kcal/molAs previously stated, Qmv converted to equivalent work units is taken as the potential of the explosive.c. Potential J
00:09:17 454.16 (4.185 × 106) 316.15
00:09:45 Pot (PETN)



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SUMMARY
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The vast majority of explosives are chemical explosives. Explosives usually have less potential energy than fuels, but their high rate of energy release produces a great blast pressure.  TNT has a detonation velocity of 6,940 m/s compared to 1,680 m/s for the detonation of a pentane-air mixture, and the 0.34-m/s stoichiometric flame speed of gasoline combustion in air.
The properties of the explosive indicate the class into which it falls. In some cases explosives can be made to fall into either class by the conditions under which they are initiated. In sufficiently large quantities, almost all low explosives can undergo a Deflagration to Detonation Transition (DDT). For convenience, low and high explosives may be differentiated by the shipping and storage classes.