摘要
静止弹燃烧热量计对含C、H、O及C、H、O、N的化合物可以给出精度非常高的实验结果,但对于含卤素、硫及金属的有机化合物,由于:(1)不能形成单一氧化态的末态产物;(2)不能形成平衡的气液两相分布;(3)末态产物在弹体与弹壁各部分不能均匀分布;所以在燃烧末态不能获得一个均匀稳定的热力学平衡态,因而得不到精密的实验结果。现在国内外采用的转动弹热量计由于当试样燃烧后可使氧弹同时沿水平轴和垂直轴转动,从而克服了上述困难,得到了稳定的热力学终态。目前转动弹燃烧量热法日益广泛地应用于含硫、
A precision rotating-bomb combustion calorimeter in which thermistors were used as elements of temperature control and temperature measurement was constructed in our laboratory. The calorimeter was calibrated with benzoic acid of purity 99.999 percent. The energy equivalent of standard calorimeter system is 18.6376±0.0022 kJK^(-1). The precision of the experiment was 0.012% (shown in the form of 2s.d m) Detailed Washburn correction was made in microcomputer with programme designed by ourselves.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1989年第2期239-242,共4页
Acta Physico-Chimica Sinica
