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“液体饱和蒸气压测定”是物理化学基础实验之一。国内物理化学实验教材中,该实验均采用类似于图1所示的装置。实践中,发现这种装置存在下列缺点:①等压计拐弯多,且一端封闭。每次清洗、烘干、装样操作麻烦、费时。②更换被测样品时,不仅等压计而且冷凝器需一起拆卸、清洗、烘干,否则会沾污样品。③实验过程中,当调节系统真空度,以使A管和B管的液面处于相同水平位置时,由于操作不熟练或不精细,常常发生空气经A和B管中的液体倒灌入C管液体上方空间的现象。此时,必须重新排除待测体系中的空气后,才
“Liquid saturated vapor pressure measurement” is one of the basic physical and chemical experiments. In domestic physical and chemical experiment teaching materials, the experiment adopts a device similar to that shown in FIG. 1 . In practice, it has been found that this device has the following disadvantages: 1 The pressure gauge has a lot of turns and is closed at one end. Every time cleaning, drying, and loading operations are troublesome and time consuming. 2 When replacing the sample to be measured, not only the isobarometer but also the condenser must be disassembled, cleaned and dried together, otherwise the sample will be contaminated. 3 During the experiment, when adjusting the vacuum of the system so that the liquid levels of the A and B tubes are at the same level, due to inexperienced or inexperienced operation, air is often poured into the C tube through the A and B tubes. The phenomenon of space above the liquid. At this point, the air in the system under test must be re-excluded.