A new method to calculate the volume and fugacity of saturated vapor is obtained. Only the molecular weight, the experimental vapor pressures at different temperature are needed for the calculation.

• 本文得到了一种不用状态方程计算饱和蒸汽摩尔体积的新方法。只要输入物质的分子量和不同温度下饱和蒸汽压的实验数据，即可得到蒸汽摩尔体积的计算。