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高中物理“热学气体性质”中所用的气体定律演示器(如 J2257型)。从原理上讲是可以的,制作工艺也是好的。但不足之处有以下两点:1.实验误差大,分析其主要原因可能是:其一,表示水银柱的刻度以厘米为单位使其水银柱高度差很难测准;其二,气体的体积测定不准确。2.水银柱细,表示的刻度小,作为演示实验,坐在中后排的同学无法看清刻度和水银柱的升降情况以及气体体积增大减小的情况,影响了实验的效果。下面介绍一种利用幻灯投影放大器演示验证气体三定律以及验证理想气体状态方程的装置,便能克服现有的气体定律演示器的缺点。一、制作方法1.取有机玻璃尺(片)。截长16厘米、宽
High school physics The gas law demonstrator used in the “heat gas properties ” (such as J2257) In principle, it is possible and the production process is also good. However, there are two shortcomings: 1. The experimental error is large. The main reasons for the analysis may be: First, the scale of the mercury column is measured in centimeters to make the height difference of the mercury column difficult to measure; Second, the gas The volumetric measurement is inaccurate. 2. The mercury column is fine and the scale is small. As a demonstration experiment, the students sitting in the middle and back row cannot see the scale of the mercury column and the lifting situation of the mercury column, and the decrease of the gas volume affects the experimental results. The following describes a device that uses a slide projector amplifier to demonstrate the three laws of gas verification and to verify the ideal gas state equation, which overcomes the shortcomings of existing gas law demonstrators. First, the production method 1. Take plexiglass ruler (film). Length 16 cm, width