I am not sure if this question belongs more in the chemistry section but here goes.
Hi, I need to calculate the pressure of the gases generated when a mass of a specific explosive compound is detonated, for which I know :
The density of the explosive (1980 kilograms per cubic metre)
Detonation Velocity of explosive (10,100 metres per second)
Volume of said confined space ( a small cylinder, with volume 1.900153047e^-6 metres cubed)
Relative Effectiveness Factor (2.38)
The explosive is octanitrocubane. 20% to 30% more powerful than RDX. One molecule of Octanitrocubane decomposes into 8 molecules of CO2 and 4 molecules of N2 (nitrogen), so it has a pretty large volume of expanding gases. I do not know the enthalpy change of this reaction and thus I don't know the heat released but it shouldn't be too difficult;t to figure out.
These expanding gases will be pushing a bullet which I require to reach 900 metres per second so I do know the total thrust that must be exerted on this bullet by the pressures generated by the explosive.
You may assume that all the materials will be able to withstand the pressures and temperatures generated. The thrust I calculated is 103.3210964 Kilo Newtons.
I know this may be a weird question but thanks for any help you guys can give me.