RK方程的系数随温度变化对氧气热力学性质的影响  

Effect on Thermodynamics Properties of Oxygen from Coefficients of RK Equation

作　　者：刘国跃[1] 廖碧涛[1] 

机构地区：[1]绵阳师范学院物理与电子工程学院,四川绵阳621000

出　　处：《绵阳师范学院学报》2011年第5期24-28,共5页Journal of Mianyang Teachers＇ College

基　　金：四川省教育厅重点科研课题(10ZA062);绵阳师院科研课题(MA2009009)

摘　　要：用热力学方法,应用实验结果研究了RK方程中RK系数随温度改变及其对氧气的内能、焓等热力学性质和摩尔热容量之差的影响。结果表明,氧气的状态应当用实际气体的状态方程例如RK方程描述,不同温度下的采用相应的RK系数才能更加符合实际;当温度很低例如低于临界温度时,两种不同的RK系数导致的相关结果相差很大;当温度高于300K时,两种不同的RK系数导致的相关结果的差异可忽略不计。Based on thermodynamic methods and experimental results, the changes of coefficients of RK equation with temperatures are discussed in this paper, that the changeable RK coefficients influence the important statics function as internal energy, enthalpy and differences of mole heat capacities in constant pressure or con- stant volume. The results show that the description of oxygen thermodynamic states with actual state equation as RK equation is suitable, but RK coefficients are changeable with temperatures, there are different RK coefficients in different temperatures to be more suitable for actual situations. The internal energy, enthalpy and differences of mole heat capacities are different, and the results from invariable RK coefficients are different from one of changeable RK coefficients, too.

关 键 词：氧气 RK方程 RK系数 摩尔热容量 

分 类 号：O414.1[理学—理论物理]