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

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

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1. Energy

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.

2. Utilization of chemical energy

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.

1. 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.

2. 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, lithium batteries; and fuel cells, etc.

Compared with converting chemical energy into the form of fuel or batteries, the latter is more _____________ and has a _________ impact on the environment.

Interactive exploration

Research point Energy Utilization of chemical energy

[Scenario Display]Common energy sources:

[Question Exploration]What are the common energy sources? How to use chemical energy?

[Integrated improvement]Common energy sources include fossil fuels, as well as water energy, solar energy, wind energy and nuclear energy. When a chemical change occurs in a substance, it is often accompanied by a change in energy. Through chemical reactions, chemical energy can be converted into other forms of energy, such as heat energy, electrical energy, etc. A chemical battery is a device that converts chemical energy directly into electrical energy.

[Application Example]

Example 1 Human life requires energy. Among the following examples of energy conversion that are not produced by chemical changes are ()

A. Light a campfire and bake food

B． Solar water heater boils water

C． Green plants convert solar energy into chemical energy

D． Coal burning to generate electricity

[ Analysis

On-site testing

Knowledge point 1 Energy

1. Which of the following energy sources is “green” energy ()

A. Natural gas b. coal

C． Petroleum D. solar energy

2. The heat required to maintain human life activities is mainly directly converted from what kind of energy ()

A. Solar energy b. chemical energy

C． Kinetic energy D. Electric energy

3. Figure 9-3-1 is a proportional diagram of my country's energy consumption structure. Which of the following statements is correct ()

A. Coal and oil are renewable energy sources

B． Fossil fuels account for 68% of energy consumption

C． Energy consumption dominated by coal should be promoted

D． Hydropower, wind power, nuclear power, etc. should be developed appropriately

Knowledge point 2: Utilization of chemical energy

4．2014·Suzhou Fossil fuels such as coal, oil, and natural gas are non-renewable energy sources. The photosynthesis of plants under light conditions and catalysis by chlorophyll can produce relatively abundant renewable resources, and its chemical equation is ____________________. Hydrogen is an ideal "green energy" with high combustion calorific value and pollution-free products. In addition to the conversion method of releasing heat energy through combustion, it can also be converted as shown in Figure 9-3-2 (Schematic diagram of hydrogen-oxygen fuel device) The principle device converts __________ energy into ________ energy. This energy conversion efficiency is high. The chemical equation of the reaction in the "hydrogen-oxygen fuel cell" is ____________________.

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

"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. Due to the exploitable ______..

"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...

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Update Time: 2024-08-01

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

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