"Carbon" is the Chinese name for the chemical element C, such as carbon monoxide, carbon dioxide, etc. "Carbon" is a general industrial term, such as charcoal, coal and coke.
1. At normal temperature, the chemical properties of carbon are stable.
2. Carbon reacts with oxygen (flammability):
Carbon burns more vigorously in oxygen than in air and emits white. light. A large amount of heat is released to generate a gas that can make lime water clear and cloudy. This is a phenomenon when carbon is completely burned in oxygen. The gas generated is carbon dioxide. p>
Ignition
1. Complete combustion: C+O2=====CO2
If a large amount of carbon is burned in a small amount of oxygen, the result will be different. At that point, it's carbon. Insufficient combustion produces a gas called carbon monoxide and releases heat.r at the same time. The chemical equation for the reaction is:
Ignition
Both reactions above often occur in kitchens using coal as fuel. The main component of coal is carbon. When there is enough air and the fire is intense, the coal burns fully and produces mainly carbon dioxide. When the fire is not intense, the coal burns insufficiently and produces a greater amount of carbon monoxide. I already learned that carbon monoxide pollutes the air. A kind of gas, carbon monoxide is a toxic gas. So, when you light a fire for warmth in winter, if the doors and windows are closed, why is it easy to get poisoned? (This is because after the doors and windows are closed, the carbon is not completely burned, generating a large amount of carbon monoxide, which easily causes poisoninggas.) The above experiment shows that carbon is flammable.
Reacts with carbon dioxide
High temperature
C+CO2 ===== 2CO
The reaction of elementary carbon and carbon dioxide requires endothermy. When carbon burns during oxidation, it releases heat. During the process of chemical change, it is also accompanied by heat changes. This is the phenomenon of endothermy and heat release in chemical reactions. We see it in real life. Examples can be confirmed. When a large amount of coal is added to a very hot fire, the humidity decreases and gas (carbon monoxide) is produced at the same time. . When it burns, it gives off a lot of heat. Emits light blue flames.
3. Reaction of carbon and water
After the reaction of carbon and water, the mixed gas generated is called water gas (mainly CO and H2). This is the product principlection of hydrogen in our industry:
High temperature
C+H2O=====CO↑+H2↑
After the reaction between carbon elemental and water, both gases present in the water generated are flammable. why wet coal burns more vigorously than dry coal.
First of all, charcoal is basically not used as a raw material in industry to produce CO and H2. Even if it is used, it does not react with water but with water vapor. Currently workingMost industries that produce CO and H2 use coal as a raw material to produce water gas. The composition of water gas is relatively complex, mainly containing CO2, CO, H2, water vapor, sulfur-containing gas, N2, CH4, etc.
Theoretically speaking, C+H2O=CO+H2, completely converting 12 tons of C to co\h2 requires 18 tons of water vapor.