中文摘要：

以中东混合原油（中东∶沙重=1∶3）以及绥中（绥中36-1）两种原油的馏分油为研究对象,利用氧弹式量热计进行燃烧热的测定,采用凝固点下降法和饱和蒸汽压渗透法（VPO法）测定相对分子质量。利用全自动折光-密度联用仪测定了样品折光率和密度,进而分析研究以上物性之间关系。结果表明：对于同一种馏分油,随着沸程升高,折光率变大,而质量燃烧热变小,折光率与质量燃烧热之间呈现一种相反的增长趋势。根据折光率n、密度d以及相对分子质量M关联出质量燃烧热Q的关系式,将实验值与理论值进行比较,结果证明理论与实际符合较好。相比实验测定液态物质的燃烧热,用较易测定的物理常数n、d、M来间接计算燃烧热提供了很大方便。

英文摘要：

The distillates of Zhongdong ∶ Shazhong = 1 ∶ 3 and Suizhong 36-1 were used as the research object. The combustion heat was determined through oxygen bomb calorimeter. The molecular weights were determined by cryoscopic method and vapor pressure osmometer method. The refractive index and density were determined through automatic refraction-density combined instrument. At last,we combined them to analysis and study their relationships. The results showed that the refractive index became large,while the value of the combustion heat went down a little with increasing boiling range for a distillate. The refractive index presented an opposite trend to that of the combustion heat quality.Through the refractive index,density and molecular weight measurement,the correlated value of the combustion heat was acquired. The results through theoretic analysis were in good match to the experimental data. Compared to the experimental determination of the combustion heat of liquid substances,the physical constants,density and molecular weight can be used to calculate the combustion heat more easily. It is necessary to understand internal relationship between material structure and combustion heat of oil for students.