Thermodynamic Energy of Pyrolants

When a pyrolant is burned in a closed chamber, both gaseous and condensed-phase products are formed, and the pressure in the chamber is increased due to the increased number of molecules and the raised temperature. The pressure in the chamber is represented by the equation of state  

When a pyrolant is composed of metallic particles and an oxidizer component, both gaseous molecules and metal oxides are formed as combustion products. Since the metal oxides are produced in the form of condensed-phase particles, the equation of state shown in Eq. (10.1) is no longer valid to evaluate the pressure in the cham- 

The pressure generated by the combustion of metallized pyrolants is sometimes lower than that generated by the combustion of non-metallized energetic materials. 

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