液体的热压力系数与正常沸点下的摩尔体积

根据改良的对应状态原理，建立了一个新的液体热压力系数计算公式，可适用于从三相点到临界点的宽阔温度范围。式中只有一个仅与分子大小有关的特性参数，该参数与正常沸点下液体摩尔体积有很好的线性关系。对４２种液体热压力系数预测结果表明，计算值与实验值的平均相对误差约为±１．７％。

Thermal Pressure Coefficient and Molar Volume at Normal Boiling Point for Liquids

Based on the principle of modified corresponding state,an equation to calculate the thermal pressure coefficients of liquids over a wide temperature range from the triple point to the critical point was established, which has only a molecular size-dependent parameter. It is found that this parameter has good linear relation with the molar volume of liquid at normal boiling point. The predicted results of the thermal pressure coefficients show that the average relative deviation from the experimental values is about l. 7% for forty-two liquids.