Experimental instrument for researching ideal gas state equation and operating method

Abstract

The invention relates to the technical field of ideal gas state equation research of high school physics, in particular to an experimental instrument for researching an ideal gas state equation and an operating method. The experimental instrument is characterized by consisting of an air cylinder, a thermometer and an air pressure gauge, the air cylinder consists of a square air cylinder body, an equal-pressure piston and a positioning-adjusting piston, the air pressure gauge and the thermometer are arranged inside the square air cylinder body, the lower-end sensing portion of the air pressure gauge extends into the square air cylinder body, the upper-end reading display portion extends out of the square air cylinder body to achieve monitoring and recording of an air pressure value, the lower-end sensing portion of the thermometer extends into the square air cylinder body, and the upper-end reading display portion extends out of the square air cylinder body to achieve monitoring and recording of a temperature value. Due to the fact that a control variable method is applied on the same device to control the isothermal, isasteric and isobaric processes respectively, three gas experiment laws are respectively inspected to obtain a conclusion and draw p-V, p-T and V-T images, and the experimental instrument has the advantages of being accurate in variable control, facilitating mastering and understanding of students and the like.

Description

technical field [0001] The invention relates to the technical field of high school physics research on the ideal gas state equation, in particular to an experimental instrument and an operation method for exploring the ideal gas state equation that are simple in structure, accurate in control variables, and easy for students to grasp and understand. Background technique [0002] As we all know, the ideal gas equation of state (also known as ideal gas law, universal gas law) is an equation of state that describes the relationship between pressure, volume, amount of substance, and temperature of an ideal gas when it is in equilibrium. It is established on the basis of Boyle- In terms of empirical laws such as Malliotte's law, Charlie's law, and Gay-Lussac's law, the equation is pV=nRT, and this equation has 4 variables: p is the pressure of the ideal gas, V is the volume of the ideal gas, and n represents The amount of gas substance, while T represents the thermodynamic temper...

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Problems solved by technology

[0003] At present, high school teachers have not carried out a systematic experimental exploration process in explaining the eighth chapter "Gas" of high school physics elective "3-3" to explore the ideal gas state equation experiment, which is not conducive to our understanding of the ideal gas state equation (or Clapeyron equation) understanding, since we know that the ideal gas state equation is QUOTE In the experimental method given in the textbook, although the state parameters such as p and T are measured by using the thermometer and the barometer, it cannot control the variables well for a certain amount of gas, and cannot control the other two while changing the state parameters. One of them does not change, and the obtained data is not easy for us to analyze and draw. At the same time, the experimental function in the textbook is relatively simple, and the three parameters p, V, and T cannot be changed arbitrarily and kept constant

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