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在气体的性质这一章的教学中.常遇到用活塞或水银柱把两部分气体分开而平衡,当一边或两边气体状态发生变化时,研究这时活塞(或水银柱)是否平衡或怎样移动.这一类题,一般解法是假定活塞(或水银柱)不动(即等客变化),研究末状态中两边压强的大小变化关系来判断为了判断末态两边压强大小变化关系,我们可以从理想气体方程导出公式,也可以从图象来判断,下面分别举例来说明以上方法的应用,(一)从气态方程导出的公式判断例1.两容器A、B装有同种气体,用一细玻璃管连接.A中温度为-10℃,B中气体温度为10℃,管中一段水银柱在中央保持平衡.当两容器温度都下降10℃时,水银柱是怎样运动?
In the teaching of the chapter on the nature of gases, it is often encountered to use a piston or mercury column to separate and balance the two gases. When one or both sides of the gas state change, study whether the piston (or mercury column) is balanced or not. Move. This type of problem, the general solution is to assume that the piston (or mercury column) is not moving (that is, wait for customer changes), to study the relationship between the pressure on both sides of the state in the end state to determine the relationship between the pressure changes in order to determine the pressure on both sides of the final state, we can The formula derived from the ideal gas equation can also be judged from the image. The following examples are used to illustrate the application of the above method. (1) The formula derived from the gaseous equation is determined. Example 1. The two containers A and B are filled with the same kind of gas. A fine glass tube is connected to a temperature of -10°C in the A, and a gas temperature of 10°C in the B. A section of the mercury column in the tube is kept in balance in the center. How does the mercury column move when the temperature of both vessels drops by 10°C?