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Authoritative PPT Summary
"The Main Element Composing Fuel—Carbon" Fuel PPT Courseware 3
learning target
Understand the physical properties and main uses of diamond and graphite.
Clarify the relationship between the properties and uses of substances.
Understand the combustion of carbon and its products.
Do you know what elements oxygen can form?
Can phosphorus form different elements?
Please think:
Can carbon element form different elements?
1. Carbon element
1.Diamond
Properties: high hardness and strong refraction
Usage: Abrasives, glass knives, drill bits, decorations
2.Graphite
Properties: gray-black, soft, smooth, electrically conductive, thermally conductive, high temperature resistant
Usage: pencil lead, lubricant, electrode, smelting metal crucible material
2. The burning of carbon
Summary of chemical properties of carbon element
1. Stability at room temperature:
The chemical properties of carbon element are very stable at room temperature.
2. Flammability
Complete combustion of carbon: C+O2==CO2
Incomplete combustion of carbon: 2C+O2 (insufficient) == CO
3. Carbon reacts with carbon dioxide at high temperatures to form carbon monoxide
(Carbon dioxide can be converted into carbon monoxide)
C+CO2 == CO
4. Properties of carbon monoxide
(1) Physical properties: CO, commonly known as coal gas, is a colorless, odorless gas that is difficult to dissolve in water.
(ii) Chemical properties:
1. Flammability
Phenomenon: A light blue flame is emitted and heat is released. A beaker with clear lime water on the inner wall is placed over the flame. It is found that the clear lime water becomes turbid.
2. Toxicity
CO easily combines with hemoglobin in the blood, causing poisoning.
Methods to prevent gas poisoning: maintain good ventilation and provide sufficient oxygen to allow the carbon to fully burn.
1. The reason why the physical properties of diamond and graphite are very different is ( )
A. The atoms that make them up are different.
B. They are composed of the same atoms, but the atoms are arranged differently
C. Their composition is different.
D. They have different uses.
2. Use the simple water purifier in the picture below to treat river water. The following analysis of the water purifier is correct ( )
A． Can sterilize and disinfect
B． Can turn hard water into soft water
C. can get pure water
D. Activated carbon mainly plays the role of adsorbing impurities
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