Does methane pollute the environment when burned sufficiently?

No, because carbon dioxide and water are generated.

Methane is a colorless, odorless, flammable, and slightly toxic gas. Methane has a weight-to-weight ratio of air, which is about half as light as air. Methane solubility is very small, in

At 1 kilopascal, 100 units of water can dissolve only 3 units of methane. At the same time, methane combustion produces a bright blue flame, but it may be greenish, because methane is burned with a glass tube, and the glass contains sodium when it is made, so it has a yellow flame color, and methane burns blue, so the mixture appears to be green.

Melting Point: Boiling Point:

Vapor pressure saturation vapor pressure (kpa):

Relative density (water = 1).

Relative vapor density (air = 1):

Heat of combustion: total calorific value: 55900kJ kg (40020kJ m3) net calorific value: 50200kJ kg (35900kj m3) critical temperature ( ).

Critical Pressure (MPa):

**Upper %(v): 15

**Lower Limit %(v v):

Flash point ( ) 188

Ignition temperature ( ) 538

Molecular diameter.

The products of methane are water and carbon dioxide, which do not pollute the environment, but have an impact on the greenhouse effect.

The experimental phenomenon of methane burning in the air is violently combusted, producing a brighter pale blue flame with water droplets.

Pure methane is ignited and burned in oxygen to produce a bright blue flame, with a dry beaker over top of the flame and water vapor can soon be seen.

To condense on the walls of the beaker, invert the beaker and add a small amount of clarified lime water.

Oscillation, lime water becomes turbid. Illustrates that methane is burned to produce water and carbon dioxide.

Collect the methane gas in a tall glass cylinder, stand upright on the table, remove the glass pieces, and quickly put the burning spoon with the burning candle into the cylinder, and the candle flame is immediately extinguished, but the methane burning at the mouth of the bottle emits a pale blue flame. This means that methane can burn quietly in the air, but it does not support combustion.

Uses of methane

Methane can be used as a fuel to produce hydrogen and carbon monoxide.

Raw materials for hydrocyanic acid, acetylene, and formaldehyde.

The main use of methane is as a fuel, such as coal gas and natural gas, as a fuel for daily needs of residents and a fuel for some businesses. It can also be used as a chemical raw material, which can be used to produce acetylene, synthetic ammonia, and methyl chloride.

Dichloromethane, chloroform, carbon tetrachloride.

and hydrocyanic acid, among others.

Methane is burned to produce water and carbon dioxide, and emits a lot of heat.

Methane combustion phenomenon: flame blue, quiet burning.

Methane is the simplest chemical compound. Methane is a colorless, odorless gas, with a negative boiling point, lighter than air, and it is a flammable gas that is extremely insoluble in water. Methane and air are mixed in the right proportions, and the fireworks will occur when the fire is served**.

The chemical properties are quite stable, and generally do not react with strong acids, strong alkalis or strong oxidants. Under the right conditions, oxidation, pyrolysis and halogenation reactions will occur.

Methane can undergo oxidation reactions and substitution reactions.

The combustion of methane in oxygen produces a bright blue flame with water droplets in the beaker above the flame and a gas that muddies the clarified lime water. The reaction equation is CH4+4O2=CO2+2H2O.

Methane burns. Expansion: Methane is an inorganic compound with the molecular formula CH4 and a molecular weight.

Methane is the simplest inorganic substance and a hydrocarbon with a lower carbon content (higher hydrogen content). Methane is widely distributed in nature and is an important component of natural gas, biogas, and biogas (commonly known as coal gas).

Methane, the simplest hydrocarbon, is composed of one carbon and four hydrogen atoms by sp3 heterobonding, so the structure of the methane molecule is a regular tetrahedral structure, and the bond length of the four bonds is the same and the bond angle is equal.

Methane structure. In its standard state, methane is a colorless and odorless gas. The biogas produced when some organic matter decomposes in the absence of oxygen is actually methane.

Theoretically, the bonding formula of methane can be expressed as a point "·" But in fact, no orange mu has ever seen this usage, probably because of "·" The number can also represent electrons. That's why methane is considered unbonded in secondary school.

Methane combustion is a phenomenon in which methane burns in oxygen to produce a bright blue flame, with water droplets appearing in a beaker above the flame and a gas that makes the clarified lime water turbid.

The reaction equation is CH4+4O2=CO2+2H2O.

Methane is an organic compound with the molecular formula CH and molecular weight of. Methane is the simplest organic matter and the hydrocarbon with the least carbon content (the largest hydrogen content). Methane is widely distributed in nature and is the main component of natural gas, biogas, pit gas, etc., commonly known as gas.

It can be used as a fuel and raw material for the production of hydrogen, carbon black, carbon monoxide, acetylene, hydrocyanic acid and formaldehyde.

Methane, chemical formula CH4, is the simplest hydrocarbon that consists of one carbon and four hydrogen atoms hybridized by sp3, so the structure of the methane molecule is a regular tetrahedral structure, and the bond lengths of the four bonds are the same and the bond angles are equal. In its standard state, methane is a colorless and odorless gas. The biogas produced when some organic matter decomposes potatoes in the absence of oxygen is actually methane.

Methane is mainly used as a fuel, such as natural gas and coal gas, and is widely used in civil and industrial applications. As a chemical raw material, it can be used to produce acetylene, hydrogen, synthetic ammonia, carbon black, carbon disulfide, methylene chloride, methylene chloride, chloroform, carbon tetrachloride and hydrocyanic acid.

(1) Combustion of coal.

Because coal contains a small amount of sulfur, nitrogen and other elements, sulfur dioxide (SO2) is emitted when burned

Nitrogen dioxide (NO2

and other pollutants, they will form acid rain when dissolved in water Acid rain not only affects human health and plant growth, but also causes damage to natural resources and buildings If coal is not fully burned, it will also produce the toxic gas carbon monoxide (CO) to pollute the air Therefore, the use of raw coal as fuel should be minimized

2) Combustion of fuel for automobiles.

The fuel used in automobiles is gasoline or diesel They will produce carbon monoxide, nitrogen oxides and unburned hydrocarbons, lead-containing compounds, soot, etc., collectively known as exhaust gases Discharged into the air, it will cause air pollution and damage to human health

Answer: Sulfur dioxide (SO2) is emitted when coal is burned

Nitrogen dioxide (NO2

and other pollutants, they will form acid rain when dissolved in water, and if coal is not fully burned, it will also produce the toxic gas carbon monoxide (CO) to pollute the air

The fuel used in automobiles is gasoline or diesel They are burned to produce carbon monoxide, nitrogen oxides and unburned hydrocarbons, lead-containing compounds, soot, etc., collectively known as exhaust gases Discharged into the air, it will cause air pollution