低温下分子间相互作用对定体热容的贡献  

The Contribution of Interaction Between Molecules to Specific Heat in the Low Temperature

作　　者：刘美希[1] 

机构地区：[1]广东工业大学应用物理系,广东广州510090

出　　处：《华南理工大学学报（自然科学版）》2001年第1期5-9,共5页Journal of South China University of Technology(Natural Science Edition)

摘　　要：详细地分析了低温下分子间相互作用对定体热容的贡献 .分析气体时采用集团展开的方法得到维里系数 ,进而求得CV 的表达式 ,得到分子间相互作用对定体热容的贡献为O(T2 )项 .而讨论液体时 ,则根据空腔理论计算径向分布函数 g(σ) ,并对 g(r)作分段处理 ,结合LJ12 - 6的分子相互作用能求得配分函数Q .讨论Q得出液体分子间相互作用对定体热容贡献为零 .This paper has analyzed the contribution of interaction between molecules to specific heat in the low temperature in detail. The author gains virial coefficient through adopting cluster expansions at gas, then derives C V , and concludes that the contribution of interaction between molecules to specific heat is O(T 2). Moreover, discusses liquid according to the empty theory,computes the radial distributive function g(σ ),deals with g(r) stage by stage, and combines the interaction energy of LJ12_6,then evalutes configuration partition Q. Finally discusses Q and reaches the conclusion that the definite volume specific heat produced by interaction between molucules is zero at liquid.

关 键 词：维里系数 径向分布函数 配分函数 分子间相互作用 定体热容 玻色子系统 费米子系统 低温 

分 类 号：O552[理学—热学与物质分子运动论] O414.2[理学—物理]