一种近理想气体状态方程及其热力学性质计算  

Calculation of Thermodynamic Properties for a Near-ideal Gas State Equation

作　　者：张弦 霍怡廷 李宇 郭乐 吴春灵 吴珍 Zhang Xian;Huo Yiting;Li Yu;Guo Le;Wu Chunling;Wu Zhen(School of Chemical Engineering,Ordos Institute of Technology,Inner Mongolia,017000;Redbud Innovation Institute of Ordos,Inner Mongolia,017000)

机构地区：[1]鄂尔多斯应用技术学院化学工程系,内蒙古017000 [2]鄂尔多斯市紫荆创新研究院,内蒙古017000

出　　处：《当代化工研究》2020年第13期19-22,共4页Modern Chemical Research

基　　金：内蒙古自治区高等学校“青年科技英才支持计划”项目(NJYT-17-B14,NKYT-18-B23)。

摘　　要：一种近理想气体的状态方程为P(Vm-b)=RT,与理想气体状态方程相近。比较理想气体状态方程、范德华气体状态方程和近理想气体状态方程,可知近理想气体分子之间没有相互作用,性质介于理想气体和范德华气体之间。计算近理想气体的热力学函数性质,如(∂V/∂T)P、(∂V/∂P)T、(∂T/∂V)P、(∂S/∂P)T、(∂S/∂T)P、(∂S/∂T)V、(∂U/∂T)P、(∂U/∂P)T、(∂U/∂T)V、(∂U/∂V)T、(∂H/∂T)P、(∂CP/∂P)T、(∂CP/∂V)T、(∂CV/∂V)T、(∂CV/∂P)T、CP-CV、(∂G/∂T)P、(∂A/∂T)V、(∂A/∂T)P和(∂A/∂P)T等性质与理想气体性质相同,其他性质与理想气体有差异。近理想气体的摩尔熵S、摩尔内能U、摩尔亥姆霍兹函数A和定压摩尔热容CP与理想气体相同,偏离性质为零。The equation of a near-ideal gas state equation is P(Vm-b)=RT,which is similar to the ideal gas equation.Comparing the state equations of ideal gas,van der Waals gas,and the near-ideal gas,it shows that there is no interaction between the molecules of near-ideal gas,and their properties are between that of ideal gas and van der Waals gas.The properties of thermodynamic functions for near-ideal gases,such as(∂V/∂T)P,(∂V/∂P)T,(∂T/∂V)P,(∂S/∂P)T,(∂S/∂T)P,(∂S/∂T)V,(∂U/∂T)P,(∂U/∂P)T,(∂U/∂T)V,(∂U/∂V)T,(∂H/∂T)P,(∂CP/∂P)T,(∂CP/∂V)T,(∂CV/∂V)T,(∂CV/∂P)T,CP-CV,(∂G/∂T)P,(∂A/∂T)V,(∂A/∂T)P and(∂A/∂P)T are calculated and the same as those of the ideal gas.However,other properties are different from those of the ideal gas.The near-ideal gas's molar entropy S,molar internal energy U,molar Helmholtz function A and constant-pressure molar heat capacity CP are the same as those of the ideal gas,and the deviation properties are zero.

关 键 词：热力学 性质 状态方程 理想气体 

分 类 号：O642.1[理学—物理化学]