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我在教学中为了因陋就简。就地取材,在不违背基本原理的前提下,对中师《物理学》中有关压强对液体沸点影响的实验进行了些改进。改进后的实验具有如下特点:(1)装置简单,操作方便。本装置没用抽气机,所用仪器一般中学都易备齐,而且便于操作。(2)现象明显。本实验能直接显示液体沸点,较为直观。(3) 1.摄氏温度计 2.弯曲小玻璃管 3.橡皮管 4.双眼橡皮塞 5.烧瓶 6.石棉网 7.酒精灯 8.铁架台节约时间。本实验操作起来比用抽气机所用时间少,便于教师课堂演示和学生实验。现将实验方法介绍如下: 一、实验装置(见附图)
In my teaching, I used Jane to make it simple. Locally based materials, without prejudice to the basic principles, have made some improvements to the experiments on the effect of pressure on the boiling point of liquids in the “Physics” of the Central Normal University. The improved experiment has the following features: (1) The device is simple and easy to operate. The device does not use suction, the equipment used is generally easy to prepare in the middle school, and easy to operate. (2) The phenomenon is obvious. This experiment can directly show the boiling point of the liquid, which is more intuitive. (3) 1. Celsius thermometer 2. Curved small glass tube 3. Rubber tube 4. Binocular rubber plug 5. Flask 6. Asbestos network 7. Alcohol lamp 8. Iron frame saves time. This experiment is less time-consuming than the use of an air pump, facilitating classroom presentations and student experiments. The experimental method is described as follows: First, the experimental device (see photos)