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本文利用统计热力学中的BH微扰理论建立数学模型,推算了Ar超临界区域比定容热容,与文献值比较平均偏差为9.54%。引入了修正函数,重新对比热容公式进行推导,再次对Ar超临界区域部分比定容热容进行计算,计算平均偏差0.39%。对CO、CO_2、CH_4等其余11种简单气体的超临界比定容热容进行计算,平均偏差在1%左右。最后给出了计算中各物质势能参数值。
In this paper, the mathematical model of BH perturbation in statistical thermodynamics is used to calculate the specific heat capacity of supercritical Ar range. The average deviation from the literature value is 9.54%. The correction function was introduced and the heat capacity formula was re-introduced to calculate the specific heat capacity of the Ar supercritical region. The average deviation was 0.39%. The supercritical specific heat capacities of the remaining 11 kinds of simple gases such as CO, CO_2 and CH_4 were calculated. The average deviation was about 1%. Finally, the calculation of the material potential energy parameter values.