The enthalpies of solution in water of complexes of RE(NO 3) 3 (RE=La～Nd, Sm～Lu, Y) with L α Histidine (His) were measured at 298.15 K. The standard enthalpies of formation of RE(His) 3+ (aq) were calculate...The enthalpies of solution in water of complexes of RE(NO 3) 3 (RE=La～Nd, Sm～Lu, Y) with L α Histidine (His) were measured at 298.15 K. The standard enthalpies of formation of RE(His) 3+ (aq) were calculated. The 'tetrad effect' regularity was observed from the curve, which is the enthalpies of solution plotted against the atomic numbers of the elements in lanthanide series.展开更多
The constant-volume combustion energy, cUD(GUDN, s, 298.15 K), enthalpy of solution in acetic ether, solmHQD and kinetic behavior of the exothermic decomposition reaction of the title compound (GUDN) are deter-mined b...The constant-volume combustion energy, cUD(GUDN, s, 298.15 K), enthalpy of solution in acetic ether, solmHQD and kinetic behavior of the exothermic decomposition reaction of the title compound (GUDN) are deter-mined by a precise rotating bomb calorimeter, a Calvet microcalorimeter and DSC, respectively. Its standard en-thalpy of combustion, cmHQD (GUDN, s, 298.15 K), standard enthalpy of formation, fHQDm (GUDN, s, 298.15 K) and kinetic parameters of the exothermic main decomposition reaction in a temperature-programmed mode [the apparent activation energy (aE) and pre-exponential factor (A)] are calculated. The values of cUD (GUDN, s, 298.15 K), cmHQD (GUDN, s, 298.15 K), fmHQD(GUDN, s, 298.15 K) and solmHQD of GUDN are (-7068.64±2.37) J·g-1, (-1467.66±0.50) kJ·mol-1, (-319.76±0.58) kJ·mol-1 and (165.737±0.013) kJ·mol-1, respectively. The kinetic model function in integral form and the value of aEand A of the exothermic main decomposition reaction of GUDN are 220.20 kJ·mol-1 and 1021.18 s-1, respectively. The critical temperature of thermal explosion of GUDN is 217.6 ℃展开更多
文摘The enthalpies of solution in water of complexes of RE(NO 3) 3 (RE=La～Nd, Sm～Lu, Y) with L α Histidine (His) were measured at 298.15 K. The standard enthalpies of formation of RE(His) 3+ (aq) were calculated. The 'tetrad effect' regularity was observed from the curve, which is the enthalpies of solution plotted against the atomic numbers of the elements in lanthanide series.
基金Project supported by the Science and Technology Foundation of Shaanxi Key Laboratory of Physico-Inorganic Chemistry (No. 29-3 2001) the Science and Technology Foundation of the National Defence Key Laboratory of Propellant and Explosive Combustion of
文摘The constant-volume combustion energy, cUD(GUDN, s, 298.15 K), enthalpy of solution in acetic ether, solmHQD and kinetic behavior of the exothermic decomposition reaction of the title compound (GUDN) are deter-mined by a precise rotating bomb calorimeter, a Calvet microcalorimeter and DSC, respectively. Its standard en-thalpy of combustion, cmHQD (GUDN, s, 298.15 K), standard enthalpy of formation, fHQDm (GUDN, s, 298.15 K) and kinetic parameters of the exothermic main decomposition reaction in a temperature-programmed mode [the apparent activation energy (aE) and pre-exponential factor (A)] are calculated. The values of cUD (GUDN, s, 298.15 K), cmHQD (GUDN, s, 298.15 K), fmHQD(GUDN, s, 298.15 K) and solmHQD of GUDN are (-7068.64±2.37) J·g-1, (-1467.66±0.50) kJ·mol-1, (-319.76±0.58) kJ·mol-1 and (165.737±0.013) kJ·mol-1, respectively. The kinetic model function in integral form and the value of aEand A of the exothermic main decomposition reaction of GUDN are 220.20 kJ·mol-1 and 1021.18 s-1, respectively. The critical temperature of thermal explosion of GUDN is 217.6 ℃
