摘要 : In order to obtain reliable data of the standard enthalpy of combustion of compounds containing carbon, hydrogen, oxygen, and nitrogen atoms, an isoperibolic micro-combustion calorimeter has been developed from a 22 cm ~3 1109A Pa... 展开 In order to obtain reliable data of the standard enthalpy of combustion of compounds containing carbon, hydrogen, oxygen, and nitrogen atoms, an isoperibolic micro-combustion calorimeter has been developed from a 22 cm ~3 1109A Parr semi-micro oxygen bomb. The calorimeter was calibrated with standard benzoic acid and the resulting energy equivalent was ε(calor) = (1497.39 ± 0.37) J · K~(-1), which means an uncertainty of 0.027%. Combustion measurements using salicylic acid and 1,2,4-triazole were made in order to verify the accuracy of the device. The values of -Δ_cu° at T = 298.15 K for the compounds were (21877.2 ± 4.6) J · g~(-1), and (19217.7 ± 1.9) J · g~(-1), respectively, in agreement with the literature values. 收起