"Oxidation and Combustion" PPT

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"Oxidation and Combustion" PPT

Part One: Introduction of New Course

In the long history of human development, burning has burned away the history of consuming raw materials and drinking blood; burning has ignited the glory of modern society. Combustion is inseparable from everything in life. Ask students to talk about where burning occurs in their lives.

[Question]What common characteristics of combustion can you find from combustion examples and phenomena? And try to define combustion?

Oxidation and Combustion PPT, Part 2: Promoting the New Lesson

1. Definition of combustion

Definition: Combustion is a luminous, exothermic and violent oxidation reaction between combustibles and oxygen.

Features: Luminescence, heat generation, oxidation reaction.

2. Combustion conditions

[Question] Combustion is closely related to human life. What kind of substances burn under what conditions? Ask students to make some guesses about combustion conditions based on their understanding of combustion, and give the basis for their guesses.

[Discuss and answer]Conditions for combustion:

⑴Combustibles;

⑵Oxygen (or air);

⑶ Reach the minimum temperature required for combustion (that is, the ignition point).

[Develop plans and design experiments]

[Thinking]Our hypothesis needs to be tested experimentally to see if it is true? Let's work together to formulate an experimental plan and design experimental steps.

[Discussion]Evaluate the rationality of the experimental plan and form an optimized experimental plan.

[Summary]The principles of controlling variables and comparing experimental methods should be used to design experimental plans.

3. Principles and methods of fire extinguishing

Everything is divided into two parts. While burning benefits mankind, it can also cause disasters caused by inappropriate and out-of-control fire use. The pictures below are pictures of two fires in Beijing and Xinjiang respectively. "Fire and water are merciless". Everyone should learn a painful lesson and enhance their awareness of safety and fire prevention.

Based on the three conditions required for combustion, how do we put out a fire?

To put out a fire is to destroy the conditions for burning.

Oxidation and Combustion PPT, Part 3: Analysis of Typical Examples

Example: Which of the following fire extinguishing methods is incorrect ( )

A. If the oil pan is on fire, put it out with water

B. If alcohol catches fire on the experimental table, cover it with a damp cloth.

C. If white phosphorus catches fire, cover it with sand and soil.

D. If an electrical appliance catches fire, cut off the power supply and cover it with a wet quilt.

Oxidation and Combustion PPT, Part 4: Class Summary

1. Definition of combustion

Combustion is a violent oxidation reaction between combustibles and oxygen that produces light and heat.

Combustion characteristics: luminescence, heat generation, oxidation reaction.

2. Combustion conditions

⑴Combustibles

⑵Oxygen (or air)

⑶ Reach the minimum temperature required for combustion.

Ignition point: The lowest temperature required for combustion.

Oxidation and Combustion PPT, Part 5: Homework

1. Select exercises from the textbook.

2. Complete the exercises in this lesson in the exercise book.

Keywords: Zhejiang Education Edition eighth grade science PPT courseware for the second volume free download, oxidation and combustion PPT download, .PPT format;

For more information about the "Oxidation and Combustion" PPT courseware, please click the Oxidation and Combustion ppt tab.

"Oxidation and Combustion" PPT courseware:

The first part of the "Oxidation and Combustion" PPT courseware content: The chemical reaction between the oxidation reaction substance and oxygen is called the oxidation reaction. Oxygen has oxidizing properties H2+CuO H2O+Cu. Inductive classification thinking: What the two phenomena have in common: Iron wire burns in oxygen , the iron wire is in the tide..

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Update Time: 2024-10-19

This template belongs to science courseware Zhejiang Education Edition Eighth Grade Science Volume 2 industry PPT template

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