"Development and Utilization of Energy" Chemistry and Life PPT Courseware 3

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"Development and Utilization of Energy" Chemistry and Life PPT Courseware 3

Energy conservation law

1. Content: Energy neither creates nor disappears out of thin air. It can only be converted from one form to another form, or transferred from one object to another. In the process of transformation or transfer, its The total amount remains the same.

2. Characteristics: The law of conservation of energy is one of the most important and universal laws in nature.

Humanity cannot live without energy

There are many types of energy. Coal, oil, natural gas, etc. are all substances buried underground that can provide energy and are often called mineral energy.

Classification of energy:

(1) Classify according to whether it is directly provided by nature

energy

Primary energy - energy directly provided by nature

(Coal, oil, wind, flowing water, etc.)

Secondary energy - energy produced from energy provided by nature

(gasoline, diesel, electricity, hydrogen energy, etc.)

(2) Classify according to whether it can be regenerated

energy

Renewable energy (water energy, wind energy, solar energy, biomass, etc.)

Non-renewable energy (coal, oil, natural gas, nuclear energy, etc.)

(3) Classification according to the perspective of energy utilization

energy

Conventional energy - energy that has been widely used

(vegetable fuels, coal, oil, natural gas, hydraulic power)

Unconventional energy sources - those that need to be developed before they can be widely used

(Solar energy, hydrogen energy, geothermal energy, tidal energy)

coal and oil

Coal and oil are currently the two most widely used energy sources in the world.

Thinking: Our country is rich in coal resources, but they are mainly concentrated in the north. Do you know why?

In ancient times, northern my country had a warm and humid climate with dense forests. Due to crustal movements, a large number of lush plants were buried underground. After complex changes, coal was formed.

my country's coal resources are 1.5 billion tons. The exploitable life is only 20.6 years, which is much lower than the world average of 42.8 years.

Petroleum is a flammable liquid energy source buried underground and is a mixture of various substances.

The gasoline, kerosene and diesel we usually use are all extracted from petroleum.

Atomic energy and solar energy

Discussion: What are the advantages of nuclear power generation compared with coal power generation?

Since the fuel of nuclear power is nuclear fuel, the advantage compared to coal or oil is that there is no air pollution, no oil leakage and other problems. Its only drawback is the presence of radioactive contamination.

Solar radiation is the main source of energy on earth

The solar energy obtained on the earth every year is huge, evenly distributed, pollution-free, and is an inexhaustible renewable energy source.

solar energy

There are three ways for humans to utilize solar energy: light energy is converted into thermal energy, light energy is converted into electrical energy, and light energy is converted into chemical energy.

Thinking: What are the limitations of current solar energy applications?

The technology is complex, the equipment is expensive, it covers a large area, and it is greatly affected by weather and other factors, making large-scale utilization of solar energy still facing many difficulties.

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For more information about the PPT courseware "Chemistry and the Development and Utilization of Energy in Life", please click the "Development and Utilization of Energy in Chemistry and Life ppt" ppt tab.

"Development and Utilization of Energy" Chemistry and Life PPT Courseware 2:

"Development and Utilization of Energy" Chemistry and Life PPT Courseware 2 Teaching Objectives 1. Know the advantages of solar energy being huge, clean, and easy to use, and understand the current ways and methods for humans to utilize solar energy. 2. Understand fission, fusion, the manufacturing principles of atomic bombs, and...

"Development and Utilization of Energy" Chemistry and Life PPT Courseware:

"Development and Utilization of Energy" Chemistry and Life PPT courseware learning objectives: 1. Understand what energy is through learning, and be able to distinguish renewable energy from non-renewable resources. 2. Know that energy is closely related to human survival and social development, and understand that human beings Discover, develop, profit...

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Update Time: 2024-07-28

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

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