"Clean Fuel—Hydrogen" Fuel PPT Courseware 2

Description

"Clean Fuel—Hydrogen" Fuel PPT Courseware 2

learning target:

1. Understand the physical properties of hydrogen and know that hydrogen is the lightest gas in the material world.

2. Understand the flammability of hydrogen and its combustion products, and know that hydrogen must be pure before igniting it.

3. Learn how to check the purity of hydrogen.

4. Understand that hydrogen is a high-energy fuel.

1. Physical properties of hydrogen

Read textbook P125 and answer the following questions:

1. At room temperature, it is a _________color________ smell gas.

2. Under standard conditions, the mass of 1 liter of hydrogen is _____ grams, which is approximately 2/29 of the same volume of air and 1/16 of oxygen. It is the densest gas in the physical world.

3. The boiling point is -252°C and the melting point is -259°C under standard atmospheric pressure.

4. Hydrogen ________ dissolves in water.

On-site training

1. The most significant feature of hydrogen different from other gases is ()

A． Colorless and odorless b. Hardly soluble in water

C. Can burn D. Minimum density

2. Chemical Properties of Hydrogen

When hydrogen and air (or oxygen) are mixed and ignited, ______ is likely to occur. After testing, it has been determined that when the volume of hydrogen mixed in the air is __________ of the total volume, an explosion will occur when ignited. This volume fraction range is called the explosion limit of hydrogen.

Therefore, when using hydrogen, you must pay special attention to safety. Before igniting hydrogen, you must __________. The purity of any flammable gas must be checked before igniting it.

2. The following gases may explode if mixed with air and ignited ( )

A.Carbon dioxide B.Hydrogen C.Nitrogen D.Oxygen

3. When checking the purity of hydrogen, you hear a popping sound. The experimental operation that should be done at this time is ( )

A. Immediately use the original test tube to collect again

B. Can be ignited directly

C. You should change to another test tube and collect it again before you can ignite it.

D. Block the mouth of the test tube with your thumb for a while and then collect until the noise is very small.

Ideal high-energy fuel

Read textbook P127 "Ideal High-Energy Fuel" and related content in the tutorial, and complete the following questions:

Hydrogen is generally favored by people as a new energy source. It has many advantages over other fuels. The reserves of petroleum, coal, natural gas and other resources are not unlimited, and hydrogen can be produced using water as raw material. When burning the same mass of hydrogen and gasoline, the heat released by the former is about three times that of the latter. There is only one product after hydrogen combustion - water, which does not pollute the environment. Based on the content of the above short article, please summarize the advantages of hydrogen as a new energy source:

①_______________; ②___________;

③_______________.

5. Hydrogen is the ideal energy source of the future. According to the analysis of the existence form of hydrogen element in nature and the properties of hydrogen, in the development and utilization of hydrogen energy, the issues that need to be solved include ① exploring cheap methods of producing hydrogen ② studying the processing technology of hydrogen combustion products ③ developing safe and efficient storage Hydrogen Technology ( )

A. Only ① B. Only ②

C.①and② D.①and③

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For more information about the PPT courseware "Hydrogen as a Clean Fuel", please click the "Hydrogen as a Fuel Clean Fuel ppt" tag.

"Clean Fuel - Hydrogen" fuel PPT courseware:

"Clean Fuel Hydrogen" Fuel PPT courseware 1. Physical properties of hydrogen ____Color____Smell____The most ____ gas soluble in water. Under normal circumstances, hydrogen is in the ____ state, with a pressure of 101.3kPa and a temperature of -252°C. At C, it is in the ____ state; the temperature is -259. ..

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Update Time: 2024-09-08

This template belongs to Chemistry courseware Cantonese Education Edition Ninth Grade Chemistry Volume 1 industry PPT template

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