Why is burning coal a chemical reaction?
Coal contains a huge amount of hydrocarbons means carbon and hydrogen. … * We are getting carbon dioxide and water from coal when exposed to air means burning of coal in air is chemical change. * The reaction is permanent means it is an irreversible reaction, it cannot be reversed.
Is burning of coal considered a chemical change?
Burning of coal, wood or leaves is also a chemical change. In fact, burning of any substance is a chemical change.
What chemical reaction happens when coal is burned?
But when coal burns, its carbon combines with oxygen in the air and forms carbon dioxide. Carbon dioxide (CO2) is a colorless, odorless gas, but in the atmosphere, it is one of several gases that can trap the earth’s heat.
Why is burning coal so bad?
Sulfur dioxide and coal – Coal-fired power plants are the largest human-caused source of sulfur dioxide, a pollutant gas that contributes to the production of acid rain and causes significant health problems. Coal naturally contains sulfur, and when coal is burned, the sulfur combines with oxygen to form sulfur oxides.
Why is coal so bad?
Several principal emissions result from coal combustion: Sulfur dioxide (SO2), which contributes to acid rain and respiratory illnesses. Nitrogen oxides (NOx), which contribute to smog and respiratory illnesses. Particulates, which contribute to smog, haze, and respiratory illnesses and lung disease.
What are the changes of burning coal?
When burned, the carbon is converted to carbon dioxide and the hydrogen to water. … This process cannot be reversed and hence, the burning of coal is a chemical change.
Can burning of coal be reversed?
When coal is burnt, the chief component, carbon is changed to carbon dioxide. This process cannot be reversed.
How is coal a chemical reaction?
So, we can think of coal as a bundle of carbon and hydrocarbon molecules held together by bonds that were formed from the sun’s energy millions of years ago. It is this very energy that makes coal so useful to us now. To release this energy, we burn the coal. This is an exothermic chemical process called combustion.
What are disadvantages of coal?
The major disadvantage of coal is its negative impact on the environment. Coal-burning energy plants are a major source of air pollution and greenhouse gas emissions. In addition to carbon monoxide and heavy metals like mercury, the use of coal releases sulfur dioxide, a harmful substance linked to acid rain.
Which is the purest form of coal?
High grade (HG) and ultra high grade (UHG) anthracite are the highest grades of anthracite coal. They are the purest forms of coal, having the highest degree of coalification, the highest carbon count and energy content and the fewest impurities (moisture, ash and volatiles).
What is the formula of coal?
The chemical formula of coal is reported as: C135H96O9NS. Coal is usually taken as 85% carbon based on dry mass.