vapour pressure

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。

Grade. Calculation of Critical Backing Pressure and Diffuser Throat Diameter of Oil Vapour Pump

油蒸汽流泵的临界前级压力及扩压器喉部直径的计算

The moisture sensor based on the gaseous electrical conductance is then developed. Its humidity sensitivity in vapour partial pressure is better than 1 Pa/ nA, and its response time is less than 1 second.

基于低电压气体导电机理的湿敏传感器的水汽分压强灵敏度优于1Pa／nA，反应时间优于一秒。

Ice possesses a lower equilibrium vapour pressure than water.

冰具有比水低的平衡蒸汽压.