We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
On the Enthalpy of Formation and Enthalpy of Sublimation of Dihydroxylammonium 5,5′‐bitetrazole‐1,1′‐dioxide (TKX‐50).
- Authors
Silva, Ana L. R.; Almeida, Ana R. R. P.; Ribeiro da Silva, Maria D. M. C.; Reinhardt, Jelena; Klapötke, Thomas M.
- Abstract
The thermodynamic characterization of dihydroxylammonium 5,5′‐bitetrazole‐1,1′‐dioxide (TKX‐50) was reinvestigated. Although TKX‐50 is one of the most promising new‐generation energetic materials, contradictory reports are found in the literature with regard to its solid enthalpy of formation. The standard (po=105 Pa) molar enthalpy of formation of crystalline TKX‐50, (175.3±1.9) kJ ⋅ mol−1, was determined experimentally based on the measured standard massic energy of combustion, determined through static‐bomb combustion calorimetry. Additionally, the standard molar enthalpy of sublimation of TKX‐50, at T=298.15 K, (165.0±2.4) kJ ⋅ mol−1, was derived from vapor pressure measurements determined by a Knudsen mass‐loss effusion technique. Finally, different approaches were used in attempts to calculate the standard enthalpy of formation of TKX‐50 in the solid state. A critical overview and assessment of the data on the enthalpy of formation of TKX‐50 is also presented.
- Subjects
HEAT of formation; THERMOCHEMISTRY; HEAT of combustion; VAPOR pressure; ENTHALPY; PRESSURE measurement
- Publication
Propellants, Explosives, Pyrotechnics, 2023, Vol 48, Issue 7, p1
- ISSN
0721-3115
- Publication type
Article
- DOI
10.1002/prep.202200361