On the basis of residual function of heat of vaporization, a new equation combined with Watson's equation was presented for heat of vaporization calculations for pure substances. 在纯物质常沸点汽化热的剩余函数预测法基础上,结合Watson方程,推导出预测纯物质任一温度下汽化热的新方程,由最基本物性数据Tb、Tc和P(?)