"Utilization of Chemical Energy" Modern Life and Chemistry PPT Courseware 3

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"Utilization of Chemical Energy" Modern Life and Chemistry PPT Courseware 3

Knowledge review

Knowledge point 1 Energy

1. At present, the energy commonly used in society is mainly ________, in addition to ________, ________, _______ and _______, etc. Since the ___________ resources that can be exploited are limited and will cause pollution to the natural environment, countries around the world are working hard to develop and utilize ___________ new energy sources.

Knowledge point 2: Utilization of chemical energy

1. When a substance undergoes a chemical change, it is often accompanied by a _______ change, which is chemical energy. Through chemical reactions, chemical energy can be converted into other energies, such as ________, _______, etc.

2. Conversion of chemical energy into thermal energy: The process of burning substances will __________, which is to convert the chemical energy of the combustion reaction into _________. This is currently the most important way to utilize chemical energy.

3. Conversion of chemical energy into electrical energy: A battery device is required to achieve this conversion. Commonly used batteries mainly include: primary batteries, such as _______; secondary batteries, such as storage batteries and lithium batteries; and fuel cells, etc.

Compared with converting chemical energy into fuel or battery, the latter is more __________ and has ______ impact on the environment.

4.Hydrogen-oxygen fuel cell

(1) Porous _____ positive and negative electrodes and _______;

(2) Hydrogen enters the ____ electrode, and oxygen enters the ____ electrode;

(3) The product after power generation is ____;

(4) Spacecraft and other spacecraft have been used.

Example analysis

►Type 1 Energy

Proposition perspective: Test students’ mastery of acid-base indicators

Example 1 According to whether energy consumption causes environmental pollution, energy can be divided into: polluting energy and clean energy. Among the following options, the former is clean energy and the latter is polluting energy ( )

A. Coal wind energy B. Solar energy petroleum

C. Petroleum hydrogen energy D. Coal petroleum

[Analysis] According to the information in the question, it can be seen that the products after burning fossil fuels will cause pollution to the environment and are polluting energy sources; hydrogen energy, wind energy, solar energy, etc. are new energy sources that will not cause environmental pollution after use and are clean energy sources. energy. So choose B.

[Variation question] Oil is an important energy source, but it is also a non-renewable energy source. Currently, mankind is facing the challenges of oil shortage and rising oil prices. Exploring new ways of energy utilization is an urgent issue for mankind. Which of the following ways to explore energy utilization is inappropriate ( )

A. Make greater use of wood B. Make more use of solar energy

C. Increase wind power generation D. Increase nuclear power generation

[Method Instructions] Energy is the material basis of human activities. In a sense, the development of human society is inseparable from the emergence of high-quality energy and the use of advanced energy technology. In today's world, energy development, energy and environment are issues of common concern to the whole world and all mankind, and are also important issues for my country's social and economic development.

[Analysis] Solar energy, wind energy, and nuclear energy are all new energy sources that can be used by humans. However, using more wood will cause harm to the environment, so choose A.

►Type 2: Utilization of chemical energy

Propositional perspective: Examine students’ mastery of the use of chemical energy

Example 2 In the following energy development and utilization processes, chemical energy is converted into electrical energy ( )

A. Hydroelectric power b. wind power

C. Solar power generation D. Fuel cell power generation

[Method Tips] Convert chemical energy into electrical energy, that is, convert energy into electrical energy after chemical changes occur. Among the four options, only fuel cells are the process of obtaining electrical energy through chemical changes.

[Analysis] A. Hydropower is the conversion of water energy into electrical energy, so this option is wrong;

B. Wind power is the conversion of wind energy into electrical energy, so this option is wrong;

C. Solar power generation is the conversion of solar energy into electrical energy, so this option is wrong;

D. Fuel cells convert chemical energy into electrical energy due to chemical changes, so this option is correct; so choose D.

[Analysis] A. In the future world, the development and use of solar energy will be most conducive to environmental protection, because solar energy is an inexhaustible and environmentally friendly new energy source, so A is in line with the meaning of the question;

B. Natural gas is a secondary energy source and a non-renewable energy source. The combustion of natural gas produces carbon dioxide, which will cause a greenhouse effect, so B does not meet the meaning of the question;

C. The products of ethanol combustion are carbon dioxide and water, which will not effectively control the greenhouse effect. Gasoline combustion will also produce harmful gases such as sulfur dioxide and nitrogen dioxide. Therefore, using ethanol gasoline can reduce vehicle exhaust pollution and improve air quality, but It is not the most conducive to environmental protection, so C does not meet the meaning of the question;

D. Waste batteries cannot be landfilled together with other waste products. Batteries contain heavy metals such as mercury and cadmium, which will pollute the environment and destroy the ecology, so C does not meet the meaning of the question;

Therefore choose A.

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"Utilization of Chemical Energy" Modern Life and Chemistry PPT Courseware 2:

"Utilization of Chemical Energy" Modern Life and Chemistry PPT Courseware 2 Learning Objectives 1. Understand the main energy sources used in today's society; 2. Know that chemical energy can be converted into heat energy, electrical energy, etc., and understand the use of chemical energy. 1. Energy Development of energy ① Firewood energy...

"Utilization of Chemical Energy" Modern Life and Chemistry PPT Courseware:

"Utilization of Chemical Energy" Modern Life and Chemistry PPT Courseware New Knowledge Preview 1 Energy At present, the energy commonly used in society is mainly ________, in addition to ________, ________, _______ and _______, etc. Due to the exploitable ___________..

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Update Time: 2024-10-04

This template belongs to Chemistry courseware Cantonese Education Edition Ninth Grade Chemistry Volume 2 industry PPT template

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