On the Enthalpy of Formation and Enthalpy of Sublimation of Dihydroxylammonium 5,5¿-bitetrazole-1,1¿-dioxide (TKX-50)

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Silva, ALR (Author) FCUP; Almeida, ARRP (Author) FCUP; da Silva, MDMCR (Author) Other; Maria D M C R Ribeiro da Silva (Author) FCUP; Klapötke, TM (Author) Other

Journal

The Journal is awaiting validation by the Administrative Services.

Title: Propellants, Explosives, Pyrotechnics

Vol. 48

ISSN: 0721-3115

Indexing

ISI Web of Knowledge - 8 Citations

Scopus - 8 Citations

Other information

Authenticus ID: P-00Y-6ZC

DOI: 10.1002/prep.202200361

Abstract (EN): 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 (p degrees=10(5) Pa) molar enthalpy of formation of crystalline TKX-50, (175.3 +/- 1.9) kJ center dot 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 center dot 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13