Method and device for demonstrating incomplete combustion experiment

Abstract

The invention discloses a method and a device for demonstrating an incomplete combustion experiment. The method comprises the following steps of: (1) taking a plate-like combustible and rolling up the combustible into a conical combustible barrel of which the diameters of the two ends are different; (2) wedging the part, which is shorter than or equal to half of the barrel, of the end of with the smaller diameter of the combustible barrel into a fireproof barrel of which the shape is matched with that of the part; (3) tilting the combustible barrel, wherein the end with the smaller diameter is arranged at a high position; and (4) igniting the end with the larger diameter of the combustible barrel, and igniting smoke when the smoke appears on the end with the smaller diameter of the fireproof barrel. The method is simple and feasible, visible in experiment phenomenon, vivid, interesting and persuasive and can be widely applied to chemical teaching of junior and high middle schools and science education popularization.

Description

technical field [0001] The invention relates to a demonstration method of an incomplete combustion experiment in chemistry teaching and a device for realizing the method. Background technique [0002] Incomplete combustion is an important chemical change, its basic feature is "there are residual combustibles in the products after combustion", and its main consequences are waste of energy and pollution of the environment. At present, in middle school chemistry teaching, people often use experiments or examples in which combustibles such as candles and coals burn under anoxic conditions to emit black smoke and produce toxic gases to illustrate the concept of incomplete combustion, but the existing experimental techniques cannot easily combust them. Finally, the smoke emitted is re-ignited and burned, so that the basic characteristics and consequences of incomplete combustion cannot be displayed intuitively, making the experiment less convincing and interesting. Contents of t...

AI Technical Summary

Problems solved by technology

At present, in middle school chemistry teaching, people often use experiments or examples in which combustibles such as candles and coals burn under anoxic conditions to emit black smoke and produce toxic gases to illustrate the concept of incomplete combustion, but the existing experimental techniques cannot easily combust them. Finally, the smoke released is re-ignited and burned, so that the basic characteristics and consequences of incomplete combustion cannot be displayed intuitively, making the experiment less convincing and interesting

Images