In calculation of vapour phase entropy, assuming that the equilibrium pressure of liquid-vapour is so small that the specific heat equation of ideal gas could be used, the entropic expression of vapour phase could be derived and a group of isobaric curves could be plotted.

  • 计算汽相熵值时假定溶液汽液两相平衡时压力较低,可以引用理想气体的比热关系式,因此可推导出汽相熵的表达式,据此表达式可以描绘出一组汽相等压线。

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