Question

Свойства каменного угля

Answer 1

Каменный уголь тяжелее воды,хрупкий,не растворяется.

Answer 2

Это осадочная порода он состоит из смеси ароматических соеденений,а так же из воды и примесей,этот уголь меняет температуру при сгорании!..

Answer 3

Properties of Coal

Coal is a fossil fuel that is primarily composed of carbon, along with various other elements such as hydrogen, sulfur, oxygen, and nitrogen. It is formed from the remains of plants that lived and died millions of years ago. Here are some key properties of coal:

1. Composition: Coal is primarily composed of carbon, with varying amounts of other elements. The carbon content of coal can range from around 60% to 95%.

2. Energy Content: Coal is known for its high energy content. The calorific value of coal, which is a measure of its energy content, can range from approximately 3600 to 8350 kilocalories per kilogram (kcal/kg).

3. Combustion: Coal is a combustible material, meaning it can burn. When coal is burned, it releases energy in the form of heat and produces carbon dioxide, water vapor, and various other byproducts.

4. Types of Coal: There are several different types of coal, classified based on their carbon content, energy content, and other properties. The main types of coal are anthracite, bituminous coal, sub-bituminous coal, and lignite. Anthracite coal has the highest carbon content and energy content, while lignite has the lowest.

5. Uses: Coal has been used as a source of energy for centuries. It is primarily used for electricity generation, as well as for industrial processes such as steel production. Coal is also used in some residential and commercial heating applications.

6. Environmental Impact: The combustion of coal releases carbon dioxide, a greenhouse gas that contributes to climate change. Coal combustion also produces other pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter, which can have negative effects on air quality and human health.

Please note that the information provided above is based on search result snippets. For more detailed and comprehensive information, it is recommended to refer to reliable sources on the topic.