R. Meyer J. Köhler A. Homburg Explosives

323 Thermodynamic Calculation of Decomposition Reactions
Results of the computer calculation*):
temperature in the rocket cham-
ber:
3075 K
temperature at the nozzle exit: 1392 K
(frozen equilibrium)
temperature at the nozzle exit: 1491 K
(equilibrium flow)
average molecular weight: 26.33 g/mol
total mole number: 37.98 mol/kg
kappa (k = cp/cv): 1.216
specific impulse for frozen
equilibrium: 2397 Ns/kg
specific impulse for shifting
equilibrium: 2436 Ns/kg
For more detailed calculations (e.g. if the presence of free carbon must
be assumed), the reader is referred to M. A. Cook: The Science of
High Explosives, Chapman & Hall, London 1958 and, by the same
author: The Science of Industrial Explosives, copyright 1974 by IR-
ECO CHEMICALS, Salt Lake City, USA. They contain basic data on
heat capacities and equilibria constants concerned, as well as computing
programs for hand and machine calculations.
The data for the following Tables have been taken from this book. The
data for enthalpies and energies of formation are taken from H. Bathelt,
F. Volk, M. Weindel, ICT-Database of Thermochemical Values,
Sixth update (2001), FRAUNHOFER-INSTITUT FÜR CHEMISCHE
TECHNOLOGIE, D-76318 Pfinztal-Berghausen.
* Calculated by the “ICT-Thermodynamic-Code”