Dissolution thermodynamics of dihydroxylammonium 5,5′-bistetrazole-1,1′-diolate in water at T = (298.15, 303.15, 308.15 and 313.15 K).

The enthalpies of dissolution for dihydroxylammonium 5, 5′-bistetrazole-1,1′-diolate (TKX-50) in water were measured using a C-80 Calvet microcalorimeter at four different temperatures under atmospheric pressure. Differential enthalpies (Δ H) and molar enthalpies (Δ H) of dissolution were calculated. The corresponding kinetic equations that describe the dissolution rate at the four experimental temperatures are d α/d t = 10(1 − α) ( T = 298.15 K), d α/d t = 10(1 − α) ( T = 303.15 K), d α/d t = 10(1 − α) ( T = 308.15 K), d α/d t = 10(1 − α) ( T = 313.15 K). In addition, the determined values of the activation energy E and pre-exponential factor A for the dissolution process are 25.08 kJ mol and 21.98 s, respectively. [ABSTRACT FROM AUTHOR]