阅读说明：本技术 一种质量守恒定律试验仪 (Mass conservation law tester ) 是由 不公告发明人 于 2018-09-06 设计创作，主要内容包括：本发明涉及生活日用品技术领域,是一种质量守恒定律试验仪。本发明包括有锥形玻璃瓶、带气球的玻璃管、传热粗铜线和由粗铜线锤扁而成的燃烧匙。用酒精灯加热粗铜线,观察到白磷开始燃烧,在反应过程中不用移动反应容器,既缩短了实验时间,又增强了实验的可行性。(The invention relates to the technical field of daily necessities, in particular to a mass conservation law tester. The invention comprises a conical glass bottle, a glass tube with a balloon, a heat transfer thick copper wire and a burning spoon formed by hammering the thick copper wire into a flat shape. The crude copper wire is heated by an alcohol lamp, the combustion of white phosphorus is observed, and a reaction container does not need to be moved in the reaction process, so that the experimental time is shortened, and the experimental feasibility is enhanced.)

1. A mass conservation law tester comprises a conical glass bottle (1), a piece of white phosphorus (3) with the size of mung beans is placed in a burning spoon (2), a balance is adjusted to keep the pointer of the balance balanced, a rough copper wire (4) is heated by an alcohol lamp, the burning of the white phosphorus can be observed immediately, thick white smoke is generated in the conical glass bottle (1), the pointer of the balance is always in a balanced state, and therefore the mass sum of all substances participating in reaction is proved to be equal to the mass sum of all substances generated after reaction.

2. The mass conservation law tester as claimed in claim 1, wherein the glass guide tube (5) with the balloon (6) is inserted into the plug of the conical glass bottle (1) to avoid the heat release during the combustion of white phosphorus, so that the gas expansion can burst the plug to cause the failure of the experiment, thereby ensuring the success rate and accuracy of the experiment.

Technical Field

The invention relates to the technical field of daily necessities, in particular to a mass conservation law tester.

Background

The first demonstration experiment of the law of conservation of mass (namely the experiment of mass measurement before and after red phosphorus burning) in the existing junior middle school chemistry teaching material (human teaching edition) finds that in the process of red phosphorus burning, the rubber stopper must be taken down, the glass tube is heated, so that the air in the conical flask flows to some extent, and the experimental result is inaccurate. The glass tube with the balloon is inserted into the bottle stopper, so that heat emitted during combustion of white phosphorus can be avoided, and the bottle stopper is flushed away by gas expansion to cause experiment failure; the method is carried out in a closed instrument, so that the pollution of combustion products to the environment is prevented; the reaction container does not need to be moved in the reaction process, so that the experimental time is shortened, and the experimental feasibility is enhanced.

Disclosure of Invention

The invention aims to provide a mass conservation law tester, which uses a thick copper wire with good heat transfer performance; changing red phosphorus into white phosphorus when the ignition point of the red phosphorus is too high; the glass tube with the balloon is inserted into the bottle stopper, so that heat is released during combustion of white phosphorus, the bottle stopper is flushed away by gas expansion, experimental failure is caused, the white phosphorus is combusted before and after, and the combustion products are prevented from polluting the environment in a closed instrument. The reaction container does not need to be moved in the reaction process, so that the experimental time is shortened, and the experimental feasibility is enhanced.

The purpose of the invention can be realized by the following technical scheme: a mass conservation law tester comprises a combustion spoon which is formed by hammering a thick copper wire into a conical glass bottle, a piece of white phosphorus with the size of mung bean is put into the combustion spoon, a glass tube with a balloon is inserted into a bottle stopper, the balance is adjusted to keep a pointer of the balance balanced, the thick copper wire is heated by an alcohol lamp, and the white phosphorus combustion can be observed immediately.

Drawings

The figures are side sectional views of the invention, with the reference numbers being described below: the device comprises a conical glass bottle 1, a burning spoon 2, white phosphorus 3 for testing, a heat transfer coarse copper wire 4, a bottle stopper 5 and a glass tube with a balloon 6.

Detailed Description

A glass tube with a balloon (6) is inserted into a bottle stopper (5), a piece of white phosphorus (3) with the size of mung beans is placed into a burning spoon (2), a balance is adjusted to keep the pointer of the balance balanced, an alcohol lamp is used for heating a thick copper wire (4), the burning of the white phosphorus can be observed immediately, thick white smoke is generated in a conical flask (1), and the pointer of the balance is always in a balanced state. It is thus demonstrated that the sum of the masses of the individual substances involved in the reaction is equal to the sum of the masses of the individual substances formed after the reaction.