Concept explainers
(a)
Interpretation:
Three factors that contribute for making coal a dirty fuel has to be listed out.
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:
In 2011, a newspaper columnist remarked that the idea of clean coal remain a distant dream. Check whether the dream of clean coal come any closer to being realized or not.
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.
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