Concept explainers
(a)
Interpretation:
The combustion of coal release several substances into the air. Of these substances, one is a gas that is produced in large amounts; its chemical formula and name have to be given.
Concept Introduction:
A fuel is a substance which releases energy in the form of heat while undergoing combustion. Hydrocarbons which have high heats of combustion make it a best fuel.
The general equation for the complete combustion of a hydrocarbon is written below,
Coal is a good fuel becouse it is completely made up of carbon atoms. It is a fossil fuel.
Coals can be classified and graded according to the carbon percent and the impurity percent such as sulfur.
Anthracite coal has high carbon content.
(b)
Interpretation:
The combustion of coal release several substances into the air. In contrast, the amount of sulfur dioxide released is relatively small. Even so, this
Concept Introduction:
A fuel is a substance which releases energy in the form of heat while undergoing combustion. Hydrocarbons which have high heats of combustion make it a best fuel.
The general equation for the complete combustion of a hydrocarbon is written below,
Coal is a good fuel becouse it is completely made up of carbon atoms. It is a fossil fuel.
Coals can be classified and graded according to the carbon percent and the impurity percent such as sulfur.
Anthracite coal has high carbon content.
(c)
Interpretation:
The combustion of coal release several substances into the air.
Concept Introduction:
Heat of combustion: It is also known as potential heat of fuel. Heat of combustion of carbon depends on its allotropic form.
A fuel is a substance which releases energy in the form of heat while undergoing combustion. Hydrocarbons which have high heats of combustion make it a best fuel.
Coal is a good fuel becouse it is completely made up of carbon atoms. It is a fossil fuel.
Coals can be classified and graded according to the carbon percent and the impurity percent such as sulfur.
(d)
Interpretation:
The combustion of coal release several substances into the air. When coal burns, fine particles of soot may be released. The health concerns with
Concept Introduction:
Heat of combustion: It is also known as potential heat of fuel. Heat of combustion of carbon depends on its allotropic form.
A fuel is a substance which releases energy in the form of heat while undergoing combustion. Hydrocarbons which have high heats of combustion make it a best fuel.
Coal is a good fuel becouse it is completely made up of carbon atoms. It is a fossil fuel.
Coals can be classified and graded according to the carbon percent and the impurity percent such as sulfur.
Particulate matter (PM) is a complex mixture of air borne particles that differ in size, origin and chemical composition, all of which are
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Chemistry In Context
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