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在关于“饱和汽性貭”这一单元的教学中,我安排了一次综合演示实验(2课时),对有关知识作了一次系统复习。现在整理出来供同志们参考。在这次实验课上,进行了以下几个实验: (1)大气压强的测定; (2)饱和汽性貭的实验; (3)液体在低压下沸腾; (4)蒸发膨胀而致冷(水汽的过饱和); (5)汽的液化; (6)未饱和汽性貭的实验; (7)验证汽的道尔顿定律。这些实验使用的是同一套设备,具体的实验装置如图1所示。现在把这七个实验进行的步骤分述如下(1)大气压强的测定
In teaching about the unit “Saturated Vapor”, I arranged for a comprehensive demonstration experiment (2 class hours) to systematically review the relevant knowledge. Now sorted out for comrades reference. In this experiment, the following experiments were carried out: (1) Determination of atmospheric pressure; (2) Experiment of saturated vapor pressure; (3) Liquid boiling at low pressure; (4) Water vapor supersaturation); (5) liquefaction of steam; (6) experiments of unsaturated steam 貭; (7) verification of Dalton’s law of steam. These experiments use the same set of equipment, the specific experimental device shown in Figure 1. Now the steps of these seven experiments are described below (1) Determination of atmospheric pressure