We report a four-parameter analytical representation to target the prediction of the molar enthalpy of gaseous diatomic molecule substances. The predicted molar enthalpy is in excellent agreement with the experimental data in a wide range of temperature for CsO, CsF, and CsCl molecules. In the temperature range from 100 to 6000 K, the average relative deviations of the predicted values from the National Institute of Standards and Technology database are 1.72\(\%\), 1.52\(\%\) , and 2.86\(\%\) for CsO, CsF, and CsCl molecules, respectively. The present model requires only to know the experimental values of four parameters which are dissociation energy, equilibrium vibrational frequency, equilibrium bond length, and the reduced molecular mass. It represents a satisfactory compromise between accuracy and rapid computation.

我们报告了一种四参数分析表示法，旨在预测气态双原子分子物质的摩尔焓。在很宽的温度范围内，CsO，CsF和CsCl分子的预测摩尔焓与实验数据非常吻合。在100到6000 K的温度范围内，来自美国国家标准技术研究所数据库的预测值的平均相对偏差为1.72 \（\％\），1.52 \（\％\）和2.86 \（\％ \）分别用于CsO，CsF和CsCl分子。本模型仅需知道四个参数的实验值，即解离能，平衡振动频率，平衡键长和降低的分子质量。它代表了准确性与快速计算之间的令人满意的折衷。