无机物液体等压热容的关联  

Correlation of Liquid Heat Capacities at Constant Pressure for Inorganic Compounds

作　　者：王双成[1] 

机构地区：[1]河南广播电视大学理工教学部,河南郑州450008

出　　处：《高校化学工程学报》2014年第3期676-679,共4页Journal of Chemical Engineering of Chinese Universities

摘　　要：根据液体等压热容的定义,在修正的Rackett方程的基础上,导出了无机化合物液体等压热容的关联式。利用该模型计算了14种无机物102个数据点的液体等压热容,计算值与实验值的总平均相对偏差为3.21%,计算准确性优于文献方法;该方法适用于各种无机化合物在不同温度下液体等压热容的估算;方法简单方便,根据摩尔质量、临界温度、临界压力、标准沸点、标准熔点和偏心因子等易查取的物性数据,不需要理想气体等压热容数据就可以直接估算该无机物液体不同温度下的等压热容。Following the definition of liquid heat capacity at constant pressure and the revised Rackett equation, a new correlation model of liquid heat capacities at constant pressure for inorganic compounds was proposed. Heat capacities of 14 different liquid inorganic compounds with 102 data points at different temperatures were predicted. Compared to the literature data, the results show that the calculated data from the new model is consistent with an overall average relative deviation of 3.21%. The model is simple and convenient, which is applicable to prediction of the liquid heat capacities at constant pressure for inorganic compounds studied at different temperatures. By using some standard physical properties such as mole mass, critical temperature, critical pressure,normal boiling point, normal melting point and eccentric factor, the liquid heat capacities at constant pressure of the inorganic compounds at different temperatures can be predicted without the heat capacity at constant pressure of corresponding ideal gases.

关 键 词：无机化合物 液体 等压热容 关联 估算 

分 类 号：O642.16[理学—物理化学]