烷烃的蒸发热与其分子结构关系的研究  

STUDY ON CORRELATION OF LATENT HEAT OF VAPORIZATION WITH MOLECULAR STRUCTURE FOR SATURATED ALIPHATIC HYDROCARBONS

作　　者：章哲彦[1] 王冬杰[1] 邵全省 

机构地区：[1]宁波师范学院化学系

出　　处：《石油学报（石油加工）》1991年第4期111-118,共8页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：本文提出了烷烃在标准状态下蒸发热的简易计算式△H_(v,298)~0=0.43438M+sum from i to n(C_(lj)^-+mδ式中M为分子量,C_(lj)和δ为结构常数,n和m分别为分子中碳数和季碳、叔碳相邻接的个数。按此式计算了150多个烷烃在标准状态下的蒸发热。计算值与实验值的平均误差小于1％。The latent heat of vaporization for saturated aliphatic hydrocarbons at the standard state are satisfactorily predicted by the equation △H_(v,298)~0=0.43438M +sum from i fo n(C_(ij)+mδ), in which M is molecular weight, C_(ij) and δ are structural constants, n and m are number of carbon atoms and number of bonds connecting two tertiary or quarternary carbon atoms in the molecule respectively. This method requires only the structural formula of the molecule and the molecular weight. By this method the latent heat of vaporization of more than 150 saturated aliphatic hydrocarbons under standard conditions are predicted. The deviation from experimental values is generally below 1%.

关 键 词：烷烃 蒸发热 分子结构 

分 类 号：O623.1[理学—有机化学]